Abstract: A ferrite sintered body contains Fe, Mn, Zn, Cu, and Ni. Supposing that Fe, Mn, Zn, Cu, and Ni are converted into Fe2O3, Mn2O3, ZnO, CuO, and NiO, respectively, and the sum of the contents of Fe2O3, Mn2O3, ZnO, CuO, and NiO is 100 mol %, the sum of the contents of Fe2O3 and Mn2O3 is 48.47 mol % to 49.93 mol %, the content of Mn2O3 is 0.07 mol % to 0.37 mol %, the content of ZnO is 28.95 mol % to 33.50 mol %, and the content of CuO is 2.98 mol % to 6.05 mol %. Furthermore, 102 ppm to 4,010 ppm Zr in terms of ZrO2 and 10 ppm to 220 ppm Al in terms of Al2O3 are contained per 100 parts by weight of the sum of the amounts of contained Fe2O3, Mn2O3, ZnO, CuO, and NiO.

Abstract: A DC conductive, low RF/microwave loss titanium oxide ceramic provides, at room temperature, a bulk DC resistivity of less than 1×1011 ohm-meters and an RF loss tangent of less than 2×10?4 at 7.5 GHz and less than 2×10?5 at 650 MHz. The resistivity is reduced by oxygen vacancies and associated Ti3+ and/or Ti4+ centers created by sintering in an atmosphere containing only between 0.01% and 0.1% oxygen. The reduced resistivity prevents DC charge buildup, while the low loss tangent provides good RF/microwave transparency and low losses. The ceramic is suitable for forming RF windows, electron gun cathode insulators, dielectrics, and other components. An exemplary Mg2TiO4—MgTiO3 embodiment includes mixing, grinding, pre-sintering in air, and pressing 99.95% pure MgO and TiO2 powders, re-sintering in air at 1400° C.-1500° C. to reduce porosity, and sintering at 1350° C.-1450° C. for 4 hours in an 0.05% oxygen and 99.05% nitrogen atmosphere.

Abstract: A hexagonal strontium ferrite powder, in which an average particle size is 10.0 to 25.0 nm, a content of one or more kinds of atom selected from the group consisting of a gallium atom, a scandium atom, an indium atom, and an antimony atom is 1.0 to 15.0 atom % with respect to 100.0 atom % of an iron atom, and a coercivity Hc is greater than 2,000 Oe and smaller than 4.000 Oe. A magnetic recording medium including: a non-magnetic support; and a magnetic layer including a ferromagnetic powder and a binding agent on the non-magnetic support, in which the ferromagnetic powder is the hexagonal strontium ferrite powder. A magnetic recording and reproducing apparatus including this magnetic recording medium.

Abstract: Mn—Zn ferrite particles according to the present invention contain 44-60% by mass of Fe, 10-16% by mass of Mn and 1-11% by mass of Zn. The ferrite particles are single crystal bodies having an average particle diameter of 1-2,000 nm, and have polyhedral particle shapes, while having an average sphericity of 0.85 or more but less than 0.95.

Abstract: Disclosed is a magnetic core having improved reliability. The magnetic core includes 37 to 44 mol % of manganese (Mn), 9 to 16 mol % of zinc (Zn), 42 to 52 mol % of iron (Fe), a magnetic additive, and a non-magnetic additive, wherein the magnetic core has a permeability of 2,900 or more and a core loss of 500 mW/cm3 or less.

Abstract: An electromechanical tool including a casing, a shaft driving a tip in rotation and a rotary transformer. The rotating shaft integrates an electronic circuit configured to measure a physical parameter of the shaft, and the rotary transformer includes a stator fixedly attached to the casing and a rotor affixed to the rotating shaft. The stator integrates a first coil and a first support of this first coil, and the rotor integrates a second coil and a second support of this second coil. The supports are made out of plasto-ferrite material.

Abstract: A cobalt ferrite magnetic powder includes magnetic particles that have a uniaxial crystal magnetic anisotropy and contain cobalt ferrite. A peak top 2? of a (3, 1, 1) plane determined by powder X-ray diffractometry using a CoK? ray is 41.3° or more and 41.5° or less. Some Cos contained in the magnetic particles are substituted with at least one selected from the group consisting of Zn, Ge, and a transition metal element other than Fe.

Abstract: A magnetic material which is likely to be cracked or chipped. The magnetic material is a magnetic material including ferrite particles and segregated particles containing Bi and Si, and characteristically, the magnetic material contains, as a main constituent, 46.0 mol % to 50.0 mol % Fe2O3, 0.4 mol % to 8.0 mol % CuO, 23.0 mol % to 32.0 mol % ZnO, and 18.0 mol % to 22.0 mol % NiO, and the ratio of the average particle size of the segregated particles to the average particle size of the ferrite particles is 0.04 or more and 0.19 or less (i.e., 0.04 to 0.19).

Abstract: Some variations provide a magnetically anisotropic structure comprising a magnetically anisotropic film on a substrate, wherein the magnetically anisotropic film contains a plurality of discrete magnetic hexaferrite particles, wherein the film is characterized by an average film thickness from 1 micron to 5 millimeters, and wherein the magnetically anisotropic film contains from 2 wt % to 75 wt % organic matter. Some variations provide a magnetically anisotropic structure comprising an out-of-plane magnetically anisotropic film on a substrate, wherein the magnetically anisotropic film contains a plurality of discrete magnetic hexaferrite particles, wherein the film is characterized by an average film thickness from 1 micron to 5 millimeters, and wherein the magnetically anisotropic film contains a concentration of hexaferrite particles of at least 40 vol %.

Abstract: A sintered MnZn ferrite body containing main components comprising 53.30-53.80% by mol of Fe calculated as Fe2O3, 6.90-9.50% by mol Zn calculated as ZnO, and the balance of Mn calculated as MnO, and sub-components comprising 0.003-0.020 parts by mass of Si calculated as SiO2, more than 0 parts and 0.35 parts or less by mass of Ca calculated as CaCO3, 0.30-0.50 parts by mass of Co calculated as Co3O4, 0.03-0.10 parts by mass of Zr calculated as ZrO2, and 0-0.05 parts by mass of Ta calculated as Ta2O5, pre 100 parts by mass in total of the main components (calculated as the oxides), and having an average crystal grain size of 3 ?m or more and less than 8 ?m and a density of 4.65 g/cm3 or more.

Abstract: A composite magnetic material has a plurality of grains having a magnetic ferrite phase, grain boundaries surrounding the grains, and a plurality of nanoparticles disposed at the grain boundaries. The nanoparticles of the composite material are both magnetic and electrically insulating, having a magnetic flux density of greater than about 100 mT and an electrical resistivity of at least about 108 Ohm-cm. Also provided is a method of making the composite material. The material is useful for making inductor cores of electronic devices.

Abstract: A method for producing MnZn ferrite comprising Fe, Mn and Zn as main components, and Ca, Si and Co, and at least one selected from the group consisting of Ta, Nb and Zr as sub-components, comprising a step of molding a raw material powder for the MnZn ferrite to obtain a green body, and a step of sintering the green body; the sintering step comprising a temperature-elevating step, a high-temperature-keeping step, and a cooling step; the cooling step including a slow cooling step of cooling in a temperature range of 1100° C. to 1250° C. at a cooling speed of 0° C./hour to 20° C./hour for 1 hours to 20 hours, and a cooling speed before and after the slow cooling step being higher than 20° C./hour; the MnZn ferrite having a volume resistivity of 8.5 ?·m or more at room temperature, an average crystal grain size of 7 ?m to 15 ?m, and core loss of 420 kW/m3 or less between 23° C. and 140° C. at a frequency of 100 kHz and an exciting magnetic flux density of 200 mT.

Abstract: The present invention provides a positive-electrode active material for non-aqueous secondary battery comprising a sodium transition metal composite oxide represented by Formula: NaxFe1-yMyO2, wherein 0.4?x?0.7, 0.25?y<1.0, and M is at least one element selected from the group consisting of manganese, cobalt and nickel, the sodium transition metal composite oxide having a crystal structure substantially composed of P63/mmc alone.

Abstract: A coil electronic component includes a magnetic body containing a ferrite; and a coil part including a plurality of conductive patterns disposed in the magnetic body. The ferrite contains 48 to 50 mol % of iron oxide calculated in terms of Fe2O3, 8 to 12 mol % nickel oxide calculated in terms of NiO, 28 to 31 mol % zinc oxide calculated in terms of ZnO, and 7 to 13 mol % copper oxide calculated in terms of CuO.

Abstract: A method is provided for producing an article which is transparent to infrared radiation. The method includes the steps of (a) disposing a plurality of nanoparticles on a substrate, wherein said nanoparticles comprise a metal sulfide or a metal selenide; (b) subjecting the nanoparticles to spark plasma sintering, thereby producing a sintered product; and (c) removing the sintered product from the substrate as a self-supporting mass.

Abstract: Measurement of the impedance and complex resistivity of a sample is used for measuring parameters resulting from a change in physical or chemical state. A variable frequency signal is provided by a transformer primary coil. A secondary coil of the transformer with a closed loop and electrically coupled said sample is monitored along with a leakage current sensor. Sampling at multiple signal frequencies is performed at the multiple signal frequencies.

Abstract: A sintered ferrite magnet comprising (a) a ferrite phase having a hexagonal M-type magnetoplumbite structure comprising Ca, an element R which is at least one of rare earth elements and indispensably includes La, an element A which is Ba and/or Sr, Fe, and Co as indispensable elements, the composition of metal elements of Ca, R, A, Fe and Co being represented by the general formula of Ca1-x-yRxAyFe2n-zCoz, wherein the atomic ratios (1-x-y), x, y and z of these elements and the molar ratio n meet the relations of 0.3?(1-x-y) ?0.65, 0.2?x?0.65, 0?y?0.2, 0.03?z?0.65, and 4?n?7, and (b) a grain boundary phase indispensably containing Si, the amount of Si being more than 1% by mass and 1.8% or less by mass (calculated as SiO2) based on the entire sintered ferrite magnet, and its production method.

Abstract: An object of the present invention is to provide a ferrite material that is excellent in temperature characteristic and DC superimposition characteristic. The present invention relates to Ni—Zn—Cu-based ferrite particles comprising 70 to 95% by weight of an Ni—Zn—Cu ferrite having a specific composition, 1 to 20% by weight of nickel oxide, 0 to 20% by weight of zinc oxide and 1 to 10% by weight of copper oxide, and a ferrite sintered ceramics obtained by sintering the ferrite particles.

Abstract: An inductor is provided including a multilayer body in which a plurality of magnetic layers containing a ferrite are laminated. A coil part including a plurality of conductive patterns is disposed in the multilayer body. External electrodes are electrically connected to the coil part. The ferrite may contain iron (Fe), manganese (Mn), nickel (Ni), zinc (Zn), and vanadium (V), and the ferrite may contain 40 to 55 mol % of iron (Fe) calculated as iron oxide (Fe2O3), 5 to 20 mol % of nickel (Ni) calculated as nickel oxide (NiO), 15 to 25 mol % of zinc (Zn) calculated as zinc oxide (ZnO), 15 to 30 mol % of manganese (Mn) calculated as manganese oxide (MnO), and 1 to 4 mol % of vanadium (V) calculated as vanadium oxide (V2O5).

Abstract: A magnetic material of an embodiment includes: first magnetic particles that contain at least one magnetic metal selected from the group including Fe, Co, and Ni, are 1 ?m or greater in particle size, and are 5 to 50 ?m in average particle size; second magnetic particles that contain at least one magnetic metal selected from the group including Fe, Co, and Ni, are smaller than 1 ?m in particle size, and are 5 to 50 nm in average particle size; and an intermediate phase that exists between the first magnetic particles and the second magnetic particles.

Abstract: In some embodiments, the present invention pertains to methods of detecting a contamination of an environment by a fracture fluid that comprises magnetic particles. In some embodiments, such methods include: (1) collecting a sample from the environment; and (2) measuring a magnetic susceptibility of the sample in order to detect the presence or absence of the magnetic particles. Further embodiments of the present invention pertain to methods of tracing fracture fluids in a mineral formation. In some embodiments, such methods include: (1) associating the fracture fluids with magnetic particles; (2) introducing the fracture fluids into the mineral formation; and (3) measuring a magnetic susceptibility of the fracture fluids. Additional embodiments of the present invention pertain to fracture fluids containing the aforementioned magnetic particles, the actual magnetic particles, and methods of making said magnetic particles.

Abstract: Embodiments disclosed herein relate to using cobalt (Co) to fine tune the magnetic properties, such as permeability and magnetic loss, of nickel-zinc ferrites to improve the material performance in electronic applications. The method comprises replacing nickel (Ni) with sufficient Co+2 such that the relaxation peak associated with the Co+2 substitution and the relaxation peak associated with the nickel to zinc (Ni/Zn) ratio are into near coincidence. When the relaxation peaks overlap, the material permeability can be substantially maximized and magnetic loss substantially minimized. The resulting materials are useful and provide superior performance particularly for devices operating at the 13.56 MHz ISM band.

Abstract: A ferrite sintered body having an improved strength and a noise filter including the same are provided. A ferrite sintered body includes 1 mol % to 10 mol % Cu on CuO basis, a spinel-structured crystal containing Fe, Zn, Ni, Cu and O as a main phase, and Cu compound particles present at a grain boundary, having an average particle diameter of 0.5 ?m to 10 ?m. The ferrite sintered body includes the Cu compound particles present at a grain boundary. It is thereby possible to suppress the grain growth of the crystals serving as the main phase to attain a morphology formed of fine crystals, and also inhibit the propagation of destruction of the grain boundary, thus making it possible to achieve a ferrite sintered body with an improved strength.

Abstract: An object of the present invention is to provide a ferrite magnetic material which can provide a permanent magnet retaining high Br and HcJ as well as having high Hk/HcJ. The ferrite magnetic material according to a preferred embodiment is a ferrite magnetic material formed of hard ferrite, wherein a P content in terms of P2O5 is 0.001% by mass or more.

Abstract: A hexagonal crystal ferrite magnetic powder having high magnetic characteristics while having a small particle volume and a high specific surface area is provided, and a high-density magnetic recording medium using the powder. A method for producing a hexagonal crystal ferrite formed using a glass crystallization method includes the steps of: mixing a glass matrix with raw materials including iron, bismuth, a divalent metal (M1), a tetravalent metal (M2), any one kind (A) of barium, strontium, calcium, and lead, and at least one kind of rare earth element (represented by R) having a mole equal to or less than that of the iron; heating the mixed raw material to obtain a glass body; quenching the glass body, pulverizing the glass body, and performing a heat treatment, and washing the glass body after the heat treatment with an acid solution.

Abstract: Embodiments and aspects of the present invention relate to an enhanced hexagonal ferrite magnetic material doped with an alkali metal. The material retains substantial magnetic permeability up to frequencies in the GHz range with low losses. The material may be used in high frequency applications in devices such as transformers, inductors, circulators, and absorbers.

Abstract: The present invention relates to ferrite particles for bonded magnet, having a volume-average particle diameter of 2.1 to 2.7 ?m and a particle diameter x90 of 4.3 to 5.4 ?m wherein the x90 represents a particle diameter at which a cumulative percentage of particles under sieve (undersize particles) based on a volume thereof is 90%, when determined from a particle size distribution thereof measured by using a laser diffraction type particle size distribution measuring apparatus.

Abstract: Disclosed herein are a nickel-zinc-copper (NiZnCu) based ferrite composition containing 0.001 to 0.3 parts by weight of bivalent metal, 0.001 to 0.3 parts by weight of trivalent metal, and 0.001 to 0.5 parts by weight of tetravalent metal based on 100 parts by weight of main component containing 47.0 to 50.0 mol % of Fe2O3, 15.0 to 27.0 mol % of NiO, 18.0 to 25.0 mol % of ZnO, and 7.0 to 13.0 mol % of CuO, and a multilayered chip device and a toroidal core using the same. According to exemplary embodiments of the present invention, a bivalent metal, a trivalent metal, and a tetravalent are contained in a NiZuCu ferrite, thereby making it possible to provide a ferrite composition having excellent quality factor (Q) characteristics. Moreover, it is possible to provide a toroidal core and a multilayered chip device having excellent sinterability, permittivity, and quality factor (Q) characteristics using the ferrite composition.

Abstract: Disclosed is a MnZnCo-based ferrite consisting of base constituents, accessory constituents, and inevitable impurities, which MnZnCo-based ferrite is characterized by adding silicon oxide (SiO2 conversion): 50-400 mass ppm and calcium oxide (CaO conversion): 1000-4000 mass ppm as secondary constituents to base constituents consisting of iron oxide (Fe2O3 conversion): 51.0-53.0 mol %, zinc oxide (ZnO conversion): greater than 12.0 mol % and less than 18.0 mol %, cobalt oxide (CoO conversion): 0.04-0.60 mol %, and manganese oxide (MnO conversion): remainder, and keeping phosphorus, boron, sulfur, and chlorine of the inevitable impurities to phosphorous: less than 3 mass ppm, boron: less than 3 mass ppm, sulfur: less than 5 mass ppm, and chlorine: less than 10 mass ppm. This MnZnCo-based ferrite has the superior characteristics of always having incremental permeability [mu]? of 2000 or greater across a wide temperature range of ?40 DEG C. to 85 DEG C.

Abstract: A ferrite powder according to the present invention includes a laminar structure exhibiting a state where W-type ferrite phases are laminated in an easy direction of magnetization, the W-type ferrite phases including a compound expressed by AM2Fe16O27, where A, M, Fe, and O represent a first metal element (Sr, Ba, Ca, Pb, etc), a second metal element (Fe, Zn, Cu, Co, Mn, Ni, etc), iron, and oxygen, respectively. This ferrite particle is obtained through: a shape forming step that shapes a mixed powder in a magnetic field to obtain a compact, the mixed powder including for example an M-type ferrite particle including a compound expressed by AFe12O19 and a spinel-type ferrite particle (S-type ferrite particle) including a compound expressed by MFe2O4; a calcination step that calcines the compact to obtain a calcined substance; and a milling step that mills the calcined substance.

Abstract: A ferrite material and an electronic component which employs sintered ferrite formed from the ferrite material. The ferrite material is obtained by adding, as minor ingredients, 0.06-0.50 parts by weight of bismuth oxide in terms of Bi2O3, 0.11-0.90 parts by weight of titanium oxide in terms of TiO2, and 0.06-0.46 parts by weight of barium oxide in terms of BaO to a ferrite powder comprising iron oxide, copper oxide, zinc oxide, and nickel oxide as major ingredients. The weight ratio among the bismuth oxide, the titanium oxide, and the barium oxide is as follows: when the proportion of the bismuth oxide in terms of Bi2O3 is taken as 1.00, then the proportion of the titanium oxide in terms of TiO2 is 1.08-2.72 and that of the barium oxide in terms of BaO is 0.72-1.20.

Abstract: A method of forming a ferrite thin film by carrying out a process for forming a coated film by coating a ferrite thin film-forming composition on a heat-resistant substrate and a process for calcining the coated film once or a plurality of times so that the thickness of the calcined film on the substrate becomes a desired thickness, and firing the calcined film formed on the substrate, in which the conditions for firing the calcined film formed on the substrate are under the atmosphere or an oxygen gas or inert gas atmosphere, a temperature-rise rate of 1° C./minute to 50° C./minute, a holding temperature of 500° C. to 800° C., and a holding time of 30 minutes to 120 minutes.

Abstract: The present invention relates to black magnetic iron oxide particles comprising magnetite as a main component, wherein when the black magnetic iron oxide particles are molded into a tablet shape, an electric resistance value of the tablet in an alternating current electric field is controlled to produce an impedance of not less than 2×106 ?cm as measured in a characteristic frequency range thereof. The black magnetic iron oxide particles according to the present invention can provide a toner capable of exhibiting a good charging performance and a uniform charging property under the high-temperature and high-humidity conditions, so that when developing an electrostatic latent image therewith, it is possible to obtain toner images having a high resolution or definition, and further the use of heavy metal elements in the black magnetic iron oxide particles can be minimized.

Abstract: A Mn—Zn—Co ferrite core includes a basic component, sub-components, and unavoidable impurities. As the sub-components, silicon oxide (in terms of SiO2): 50-400 mass ppm and calcium oxide (in terms of CaO): 1000-4000 mass ppm are added to the basic component consisting of iron oxide (in terms of Fe2O3): 51.0-53.0 mol %, zinc oxide (in terms of ZnO): more than 12.0 mol % and 18.0 mol % or less, cobalt oxide (in terms of CoO): 0.04-0.60 mol %, and manganese oxide (in terms of MnO): balance; Phosphorus, boron, sulfur, and chlorine in the unavoidable impurities are reduced as follows, phosphorus: less than 3 mass ppm, boron: less than 3 mass ppm, sulfur: less than 5 mass ppm, and chlorine: less than 10 mass ppm; and a ratio of a measured specific surface of the Mn—Zn—Co ferrite core to an ideal specific surface of the Mn—Zn—Co ferrite core satisfies: Measured specific surface/ideal specific surface <1500.

Abstract: Disclosed is a MnZn ferrite core comprising basic components, subcomponents and unavoidable impurities. To the basic components comprising: iron oxide (as Fe2O3): 51.0-54.5 mol %, zinc oxide (as ZnO): 8.0-12.0 mol % and manganese oxide (as MnO): remainder, are added silicon oxide (as SiO2): 50-400 mass ppm and calcium oxide (as CaO): 50-4000 ppm as subcomponents and in the unavoidable impurities, phosphorous, boron, sulfur and chlorine are respectively kept to: less than 3 mass ppm, less than 3 mass ppm, less than 5 mass ppm, and less than 10 mass ppm. The ratio of the measure specific surface area to the ideal specific surface area of the MnZn ferrite core satisfies the formula: Measured specific surface area/ideal specific surface area<1500.

Abstract: A Ni—Zn—Cu ferrite material having excellent DC bias characteristics is provided by adding zinc silicate thereto. The above problem can be solved by Ni—Zn—Cu ferrite particles which comprise a spinel-type ferrite and zinc silicate, which have a composition comprising 36.0 to 48.5 mol % of Fe2O3, 7.0 to 38 mol % of NiO, 4.5 to 40 mol % of ZnO, 5.0 to 17 mol % of CuO and 1.0 to 8.0 mol % of SiO2, all amounts being calculated in terms of the respective oxides, and which have a ratio of an X-ray diffraction intensity from a 113 plane of the zinc silicate to an X-ray diffraction intensity from a 311 plane of the spinel-type ferrite is 0.01 to 0.12; a green sheet obtained by forming a material comprising the Ni—Zn—Cu ferrite particles into a film; and a Ni—Zn—Cu ferrite sintered ceramics.

Abstract: Disclosed is a magnetic material having high Hc and High Curie point, which is capable of controlling such magnetic characteristics without requiring rare or expensive raw materials. Specifically disclosed is a magnetic material composed of particles of a magnetic iron oxide which is represented by the following general formula: ?-AxByFe2?x?yO3 or ?-AxByCzFe2?x?y?zO3 (wherein A, B and C each represents a metal excluding Fe and different from each other, satisfying 0<x, y, z<1), with ?-Fe2O3 as a main phase.

Abstract: This invention relates to a manufacturing method of colloid comprising magnetic nanoclusters and magnetic nanocluster colloid made by the same. More particularly, this invention relates to a manufacturing method of colloid comprising magnetic nanoclusters comprising magnetic precursor and heterometal precursor by a certain ratio and magnetic nanocluster colloid made by the same.

Abstract: An aspect of the present invention relates to a method of manufacturing a hexagonal ferrite magnetic powder comprising preparing a melt by melting a starting material mixture comprising a hexagonal ferrite-forming component and a glass-forming component; rapidly cooling the melt to obtain an amorphous material comprising 0.3 to 2.0 weight percent of carbon atoms; heating the amorphous material to a temperature range of 580 to 700° C. and maintaining the amorphous material within the temperature range to precipitate hexagonal ferrite magnetic particles; and collecting the hexagonal ferrite magnetic particles precipitated.

Abstract: A MnZn ferrite having excellent characteristics of an incremental permeability ?? value of 250 or greater in a wide temperature range of 0 to 85° C. and an incremental permeability ?? value of 400 or greater at 65° C. when an 80 A/m direct current magnetic field is applied is provided. The MnZn ferrite has basic components that comprise: ferric oxide (in terms of Fe2O3): 51.0 to 54.5 mol %, zinc oxide (in terms of ZnO): 8.0 to 12.0 mol %, and manganese oxide (in terms of MnO): the balance, sub components that comprise: silicon oxide (in terms of SiO2): 50 to 400 mass ppm, and calcium oxide (in terms of CaO): 50 to 400 mass ppm, and unavoidable impurities phosphorous, boron, sulfur and chlorine that are restricted to phosphorous: less than 3 mass ppm, boron: less than 3 mass ppm, sulfur: less than 5 mass ppm, and chlorine: less than 10 mass ppm.

Abstract: Single crystal and polycrystal oxoruthenates having the generalized compositions (Baz,Sr1?z)FexCoyRu6?(x+y)O11 (1?(x+y)?5; 0?z?1) and (Ba,Sr)M2±xRu4?xO11 (M=Fe,Co) belong to a novel class of ferromagnetic semiconductors with applications in spin-based field effect transistors, spin-based light emitting diodes, and magnetic random access memories.

Abstract: Disclosed herein are a multilayer type inductor including a magnetic layer composition including NiZn ferrite, a multilayer type coil component including a magnetic layer prepared therefrom, and a method for manufacturing the same. According to the present invention, a copper electrode can be used as an internal electrode of a multilayer type coil product, by including NiZn ferrite in the magnetic layer. As copper is used for the internal electrode, material costs can be significantly reduced. Furthermore, the present invention can improve the maximum saturation magnetization value against the NiCuZn ferrite by about 10%, due to exclusion of Cu having weak magnetism, and can be more desirably used in a product employing high current.

Abstract: A ferrite powder for producing a ferrite sintered body is provided, the ferrite powder having a median diameter D50 [?m] in a range from 0.1 to 0.8 ?m, a degree of spinel formation in a range from 45 to 90%, and a remanent magnetization Br per unit mass [emu/g] satisfying the following formula after application of the maximum magnetic field of 15 kOe: 0.05?Br?2.0(ln.D50)+6.3. This ferrite powder produces a homogeneous ferrite sintered body having very few cracks by gel casting.

Abstract: A composite material can include a grain component and a nanostructured grain boundary component. The nanostructured grain boundary component can be insulating and magnetic, so as to provide greater continuity of magnetization of the composite material. The grain component can have an average grain size of about 0.5-50 micrometers. The grain boundary component can have an average grain size of about 1-100 nanometers. The nanostructured magnetic grain boundary material has a magnetic flux density of at least about 250 mT. The grain component can comprise MnZn ferrite particles. The nanostructured grain boundary component can comprise NiZn ferrite nanoparticles. Core components and systems thereof can be manufactured from the composite material.

Abstract: A novel NiMnZn-based ferrite which can reduce magnetic loss (core loss) at a high frequency of about 2 MHz or higher and achieve higher saturated magnetic flux density while forming high sintered density is provided. The NiMnZn-based ferrite contains a main component comprising 54.0 to 57.5 mol % of iron oxide in terms of Fe2O3, 2.0 to 7.0 mol % of zinc oxide in terms of ZnO, 0.5 to 4.7 mol % of nickel oxide in terms of NiO, and a remainder of manganese oxide (in terms of MnO); and an accessory component comprising 100 to 1000 ppm by weight of Si in terms of SiO2, 800 to 3000 ppm by weight of Ca in terms of CaCO3, and 520 to 1000 ppm by weight of Nb in terms of Nb2O5 with respect to the main component; while having an average ferrite crystal particle size of 2.1 to 8.5 ?m.

Abstract: An aspect of the present invention relates to magnetic recording powder, which comprises hexagonal ferrite magnetic particles, the hexagonal ferrite magnetic particle comprising 0.5 to 5.0 atomic percent of an Fe substitution element in the form of just a divalent element per 100 atomic percent of a content of Fe and having an activation volume ranging from 1,200 to 1,800 nm3.

Abstract: A magnetic composition for power conversion includes a thermoplastic polymer and magnetic powders. The composition has a tensile strength of greater than 20 N/mm2.

Abstract: The present invention is related to magnetic pigments comprising a transparent flaky homogeneously composed substrate having two parallel major surfaces and a coating comprising maghemite, to a process for the production of said pigments as well as to their use.

Abstract: The ferrite sintered body of the present invention contains main components consisting of 52 to 54 mol % Fe2O3, 35 to 42 mol % MnO and 6 to 11 mol % ZnO as oxide equivalents and additives including Co, Ti, Si and Ca in specified amounts, and has a temperature at which the power loss is a minimal value (bottom temperature) of higher than 120° C. in a magnetic field with an excitation magnetic flux density of 200 mT and a frequency of 100 kHz, and a power loss of 350 kW/m3 or less at the bottom temperature.

Abstract: A method for manufacturing ferrite powder comprises a step (a) of causing a precursor, obtained by a liquid-phase reaction method, to pass through a sieve with openings of 2 mm or less, and a step (b) of causing free fall, through the interior of a furnace tube heated to the range 750 to 1250° C. by a heater, of the precursor which has passed through the sieve. In the process of causing free fall through the interior of the furnace tube heated by the heater, ferrite powder, which is a single phase of hexagonal ferrite, is obtained by heating the precursor to a prescribed temperature and holding the precursor at the prescribed temperature.