Abstract: To provide a magnetic powder production method, a magnetic sheet production method, and an antenna module production method that are capable of reducing a size of magnetic particles, achieving thinning and a low loss, and improving magnetic permeability without lowering it. At least two oxide-based magnetic materials are mixed, preliminarily calcined, and pulverized. The pulverized magnetic materials are typically formed into a paste by being dispersed in an organic solvent, and the magnetic materials are applied onto a film after being subjected to defoaming processing. Accordingly, a sheet-like magnetic material is formed. The sheet-like magnetic material is cut into predetermined sizes so as to be fragmented into particles, with the result that magnetic particles are formed.

Abstract: A method for preparing a rare earth permanent magnet material comprising the steps of: disposing a powder comprising one or more members selected from an oxide of R2, a fluoride of R3, and an oxyfluoride of R4 wherein R2, R3 and R4 each are one or more elements selected from among rare earth elements inclusive of Y and Sc on a sintered magnet form of a R1—Fe—B composition wherein R1 is one or more elements selected from among rare earth elements inclusive of Y and Sc, and heat treating the magnet form and the powder at a temperature equal to or below the sintering temperature of the magnet in vacuum or in an inert gas. The invention offers a high performance, compact or thin permanent magnet having a high remanence and coercivity at a high productivity.

Abstract: An object of the present invention is to provide a ferrite magnetic material capable of providing a permanent magnet in which high Br and HcJ are kept, and which has a high Hk/HcJ. A ferrite magnetic material in accordance with a preferred embodiment has a ferrite phase having a hexagonal structure and has a main composition represented by Ca1-w-x-yRwSrxBayFezMmO19(R is at least one element of rare earth elements (including Y) essentially including La, and Bi, and M is at least one element of Co, Mn, Mg, Ni, Cu, and Zn essentially including Co), where 0.25<w<0.65, 0.01<x<0.45, 0.0002<y<0.011, y<x, 8<z<11, 1.0<w/m<2.5, and 0.017<m/z<0.065 are satisfied. The total amount of a Si component is 0.1 to 3 mass % based on the amount of the main composition, and respective elements satisfy the relationship of 1.5?[(Ca+R+Sr+Ba)?(Fe+M)/12]/Si?3.5.

Abstract: Embodiments disclosed herein include methods of modifying synthetic garnets used in RF applications to reduce or eliminate Yttrium or other rare earth metals in the garnets without adversely affecting the magnetic properties of the material. Some embodiments include substituting Bismuth for some of the Yttrium on the dodecahedral sites and introducing one or more high valency ions to the octahedral and tetrahedral sites. Calcium may also be added to the dodecahedral sites for valency compensation induced by the high valency ions, which could effectively displace all or most of the Yttrium (Y) in microwave device garnets. The modified synthetic garnets with substituted Yttrium (Y) can be used in various microwave magnetic devices such as circulators, isolators and resonators.

Abstract: Techniques for dyeing material are disclosed, including providing a magnetorheological fluid containing a coloring agent onto a contacting surface, applying a magnetic field to the magnetorheological fluid to increase viscosity of the magnetorheological fluid, and contacting the material with the magnetorheological fluid on the contacting surface to dye the material with the coloring agent.

Abstract: Disclosed herein are a ferrite composition for a high frequency bead in that a part of Fe in M-type hexagonal ferrite represented by BaFe12O19 is substituted with at least one metal selected from a group consisting of 2-valence, 3-valence and 4-valence metals, as well as a chip bead material using the same. According to embodiments of the present invention, the dielectric composition is characterized in that a part of Fe as a constituent of M-type hexagonal barium ferrite is substituted by other metals, to thus decrease a sintering temperature to 920° C. or less without using any additive for low temperature sintering. Moreover, because of high SRF properties, the inventive composition is applicable to a multilayer type chip bead used at a high frequency of more than several hundreds MHz and a magnetic antenna.

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.

Abstract: The invention relates to a magnetic garnet single crystal and an optical element using the same, for the purpose of providing a magnetic garnet single crystal at a reduced Pb content, and an optical element using the same, where the magnetic garnet single crystal is represented by the chemical formula Bi?M13-?Fe5-?-?M2?M3?O12 (M1 is at least one element selected from Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu; and M2 is Si; and M3 is at least one element selected from Zn, Ni, Cu and Mg, provided that 0.5<??2.0, 0<?, and 0<y).

Abstract: Disclosed is a magnetic material comprising a crystal of ?-GaxFe2-xO3 (wherein 0<x<1) prepared by substituting a part of Ga3+ ion sites of an ?-Fe2O3 crystal with Fe3+ ions and having X-ray diffraction peaks corresponding to the crystal structure of ?-Fe2O3. The coercive force of the magnetic material lowers in accordance with the Ga content thereof, and the saturation magnetization thereof has a maximum value.

Abstract: Disclosed is a magnetic crystal for electromagnetic wave absorbing materials, having a structure of ?-MxFe2-xO3 with 0<x<1, which has the same space group as that of an ?-Fe2O3 crystal and which is derived from an ?-Fe2O3 crystal by substituting a part of the Fe site therein with M. In this, M is a trivalent element having an effect of lowering the coercive force Hc of ?-Fe2O3 crystal by the substitution. Concretely, the element M includes Al and Ga. An electromagnetic wave absorber having a packed structure of particles having such a substituent element M-added “M-substituted ?-Fe2O3 crystal” as the magnetic phase may control the electromagnetic wave absorption peak frequency depending on the degree of substitution with the element M, and for example, the invention gives an electromagnetic wave absorber applicable to a 76 GHz band for on-vehicle radars.

Abstract: A sintered ferrite magnet having an M-type ferrite structure and comprising Ca, an R element which is at least one rare earth element indispensably including La, Ba, Fe and Co as indispensable elements, which is represented by Ca1-x-yRxBayFe2n-zCoz, wherein (1?x?y), x, y, z and n are numbers representing the amounts of Ca, the R element, Ba and Co and a molar ratio, meeting 0.2?x?0.65, 0.001?y?0.2, 0.03?z?0.65, and 4?n?7.

Abstract: The present invention provides a ferrite magnetic material capable of attaining such magnetic properties that Br+(?)HcJ is 6200 or more even by sintering at a temperature of 1150° C. or lower. The ferrite magnetic material includes as a main phase thereof a ferrite phase having a hexagonal structure, the main phase being represented by the following composition formula (1): LaxCam?1?x?m(Fe12?yCoy)z with ? representing one or two of Ba and Sr; wherein the constituent ratios of the metal elements constituting the main phase satisfy the following conditions: x and m are the values in a region bounded by the points, A: (0.53, 0.27), B: (0.64, 0.27), C: (0.64, 0.35), D: (0.53, 0.45), E: (0.47, 0.45) and F: (0.47, 0.32) in the (x, m) coordinates shown in FIG. 2; 1.3?x/yz?1.8; and 9.5?12z?11.0.

Abstract: A sintered ferrite magnet having a basic composition represented by the general formula: A1?x?y+aCax+bRy+cFe2n?zCoz+dO19 (atomic ratio), wherein a, b, c and d represent the amounts of an A element, Ca, an R element and Co added in the pulverization step of an oxide magnet material, which are numerals meeting the conditions of 0.03?x?0.4, 0.1?y?0.6, 0?z?0.4, 4?n?10, x+y<1, 0.03?x+b?0.4, 0.1?y+c?0.6, 0.1?z+d?0.4, 0.50?[(1?x?y+a)/(1?y+a+b)]?0.97, 1.1?(y+c)/(z+d)?1.8, 1.0?(y+c)/x?20, and 0.1?x/(z+d)?1.2.

Abstract: A process for mechanically strengthening a permanent magnet includes providing nanofibers or nanotubes, providing a ferromagnetic metal, defining a mixture by mixing the ferromagnetic metal with the nanofibers or nanotubes and sintering the mixture.

Abstract: Rubber compound containing at least one nanoscale, magnetic filler and at least one non-magnetic filler. Vulcanizable mixture containing the rubber compound and at least one crosslinking agent and/or vulcanization accelerator. Molding obtainable from the vulcanizable mixture by heat treatment or action of an electrical, magnetic or electromagnetic alternating field.

Abstract: The present invention relates to a magnetic garnet single crystal prepared by the liquid phase epitaxial (LPE) process and an optical element using the same as well as a method of producing the single crystal, for the purpose of providing a magnetic garnet single crystal at a reduced Pb content and an optical element using the same, as well as a method of producing the single crystal. The magnetic garnet single crystal is grown by the liquid phase epitaxial process and is represented by the chemical formula BixNayPbzM13?x?y?zFe5?wM2wO12 (M1 is at least one element selected from Y, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu; and M2 is at least one element selected from Ga, Al, In, Ti, Ge, Si and Pt, provided that 0.5<x?2.0, 0<y?0.8, 0?z<0.01, 0.19?3?x?y?z<2.5, and 0?w?1.6).

Abstract: Disclosed is a magnetic crystal for electromagnetic wave absorbing materials, having a structure of ?-MxFe2-xO3 with 0<x<1, which has the same space group as that of an ?-Fe2O3 crystal and which is derived from an ?-Fe2O3 crystal by substituting a part of the Fe site therein with M. In this, M is a trivalent element having an effect of lowering the coercive force Hc of ?-Fe2O3 crystal by the substitution. Concretely, the element M includes Al and Ga. An electromagnetic wave absorber having a packed structure of particles having such a substituent element M-added “M-substituted ?-Fe2O3 crystal” as the magnetic phase may control the electromagnetic wave absorption peak frequency depending on the degree of substitution with the element M, and for example, the invention gives an electromagnetic wave absorber applicable to a 76 GHz band for on-vehicle radars.

Abstract: An oxide magnetic material according to the present invention is represented by the formula: (1?x)CaO.(x/2)R2O3.(n?y/2)Fe2O3.yMO, where R is at least one element selected from the group consisting of La, Nd and Pr and always includes La, M is at least one element selected from the group consisting of Co, Zn, Ni and Mn and always includes Co, and the mole fractions x, y and n satisfy 0.4?x?0.6, 0.2?y?0.35, 4?n?6, and 1.4?x/y?2.5. The oxide magnetic material includes a ferrite having a hexagonal M-type magnetoplumbite structure as a main phase.

Abstract: It is an object of the present invention to provide a magnetic garnet single crystal capable of reducing the optical loss of the resulting rotator even when the magnetic garnet single crystal is grown using a solvent containing Na by the liquid phase epitaxial process, as well as a Faraday rotator using the same. A magnetic garnet single crystal represented by the chemical formula Bi?Na?M13-?-?-?M2?Fe5-?-?Mg?M3?O12 (M1 is at least one element or more selected from Y, Eu, Gd, Tb, Dy, Ho, Yb and Lu; and M2 is at least one element or more selected from Ca and Sr; M3 is at least one element or more selected from Si, Ge, Ti, Pt, Ru, Sn, Hf and Zr, provided that 0.60<??1.50, 0<??0.05, 1.35<3??????<2.40, 0???0.10, 0???0.10, 0<??0.10, 0<?+??0.10, 0<?+??0.10).

Abstract: An oxide magnetic material according to the present invention is represented by the formula: (1?x)CaO.(x/2)R2O3.(n?y/2)Fe2O3.yMO, where R is at least one element selected from the group consisting of La, Nd and Pr and always includes La, M is at least one element selected from the group consisting of Co, Zn, Ni and Mn and always includes Co, and the mole fractions x, y and n satisfy 0.4?x?0.6, 0.2?y?0.35, 4?n?6, and 1.4?x/y?2.5. The oxide magnetic material includes a ferrite having a hexagonal M-type magnetoplumbite structure as a main phase.

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: The invention relates to a modified strontium ferrite of the general chemical formula: Sr1-xLaxFe12-yCoyO19; in which x=y=0.01-1.00 or x=0.15 and y=x/1.6n to =x/2.6n, where n is the Fe2O3:SrO ratio used and may be 5-6. According to the invention, lanthanum and cobalt are added in an amount such that 0.14?x?0.145 and 0.14?y?0.145. The modified strontium ferrite thus prepared has excellent magnetic properties with regard to the remanence BR, the coercive force HCJ and the ratio of HK to HCJ.

Abstract: The current invention relates to a method for the production of a magnetic layer on a substrate, comprising the production of a printable varnish, containing 60 weight-% of neodym iron boron powder, 10 weight-% of ferrite powder, preferably strontium hexaferrite powder, 1.4 weight-% of a catalyst, 1.1 weight-% of a dispersing additive, and as the remainder a matrix, preferably an epoxy polyol matrix. These agents are mixed by means of stirring or kneading, and rolled in a three-roll mill. Preferably, they are applied to a substrate by screen printing, and subsequently pre-cured at 80 to 120° C. for six to twelve hours, and then cured at 200° C. to 220° C. for three hours.

Abstract: The invention relates to a ferrite material of garnet structure based on yttrium and iron and containing copper, which makes it possible for its sintering temperature to be substantially lowered compared with the conventional ferrite materials of garnet type which satisfy the following chemical formula: YaREbFecAldIneCafCugZrhViCojSikO12±? where RE: is a rare earth or a combination of rare earths and 3(a+b+c+d+e)+2(f+g+j)+4(h+k)+5i=24±2? 1?a?3.5; 0?b?1.5; 4?c?5; 0?d?1.5; 0?e?0.8; 0?f?1; 0?g?0.05; 0?i?0.8; 0?j?0.5; 0?k?0.5. The invention is useful in the following applications: microwave components, low-loss inductive passive components operating at frequencies of the order of gigahertz.

Abstract: Disclosed herein is a method of manufacturing sialon having magnetic properties, including: mixing silicon nitride, aluminum nitride, alumina and rare-earth oxide to form a mixture; and sintering the mixture in a nitrogen atmosphere, wherein the resulting sialon has a saturation magnetization value ranging from 0.15 to 0.24 emu/g. In the method, iron (Fe) is added to the mixture to form iron silicide, thus improving the magnetic properties of the sialon. The method is advantageous in that it can be applied to fields requiring electromagnetic materials such as high-speed transmission transformer cores, electromagnet cores and the like, and magnetic properties are additionally imparted to sialon having excellent structural properties, so that it is expected that it will be widely used in the future.

Abstract: An oxide magnetic material includes a ferrite with a hexagonal structure as its main phase. Metallic elements included in the oxide magnetic material are represented by the formula: Ca1-x-x?LaxSrx?Fe2n-yCoy, where atomic ratios x, x? and y and a molar ratio n satisfy 0.4?x?0.6, 0.01?x??0.3, 0.2?y?0.45 and 5.2?n?5.8, respectively.

Abstract: A polycrystalline, magnetic ceramic material having a basic composition represented by the general formula of (Y3-x-y-zBiXCayGdz)(Fe5-?-?-?-?In?Al?V?Zr?)O12, wherein 0.4<x?1.5, 0.5?y?1, 0?z?0.5, y+z<1.3, 0???0.6, 0???0.45, 0.25???0.5, 0???0.25, and 0.15 ??+??0.75 each by an atomic ratio, which is predominantly composed of a phase having a garnet structure, and sinterable at a temperature of 850-1050° C.

Abstract: A rotating machine comprising a sintered ferrite magnet having an M-type ferrite structure, comprising Ca, an R element that is at least one of rare earth elements and indispensably includes La, Ba, Fe and Co as indispensable elements, and having a composition represented by the formula: Ca1-x-yRxBayFe2n-zCoz, wherein (1?x?y), x, y, z and n represent the contents of Ca, the R element, Ba and Co, and a molar ratio, meeting 0.3?1?x?y?0.65, 0.2?x?0.65, 0.001?y?0.2, 0.03?z?0.65, 4?n?7, and 1?x?y>y; a bonded magnet comprising ferrite powder having the above composition and a binder, and a magnet roll, at least one magnetic pole portion of which is made of the above bonded magnet.

Abstract: The present invention relates to ferromagnetic metal particles having a bulk density (?a) of not more than 0.25 g/cm3, a process for producing the above ferromagnetic metal particles and a magnetic recording medium comprising a non-magnetic substrate; a non-magnetic undercoat layer formed on the non-magnetic substrate which comprises non-magnetic particles and a binder resin; and a magnetic recording layer formed on the non-magnetic undercoat layer which comprises magnetic particles and a binder resin, wherein the above ferromagnetic metal particles were used as the magnetic particles.

Abstract: A thick film bismuth doped rare earth iron garnet greater than 50 ?m in thickness with a growth-induced uniaxial anisotropy less than zero, such that all the magnetic domains in the film have their magnetization vectors in the plane of the film. A preferred embodiment comprises a film of composition Bi1.13Gd1.36Lu0.51Fe4.55Ga0.45O12. Films with such anisotropy solve the problem of devices and sensors that require a continuously varying Faraday rotation without the effective insertion losses that are inherent to discrete perpendicular domains. A similar effect can be achieved with a film of perpendicular domains by launching the light in the plane of the thick film in a non-waveguiding mode as opposed to the conventional perpendicular direction.

Abstract: A ferrite magnetic material comprising a main phase of W-type is provided which has magnetic properties improved through the optimization of additives. The ferrite magnetic material comprises a main constituent having a compound represented by composition formula AFe2+aFe3+bO27 (wherein A comprises at least one element selected from Sr, Ba and Pb; 1.5?a?2.1; and 12.9?b?16.3), a first additive containing a Ca constituent (0.3 to 3.0 wt % in terms of CaCO3) and/or a Si constituent (0.2 to 1.4 wt % in terms of SiO2), and a second additive containing at least one of an Al constituent (0.01 to 1.5 wt % in terms of Al2O3), a W constituent (0.01 to 0.6 wt % in terms of WO3), a Ce constituent (0.001 to 0.6 wt % in terms of CeO2), a Mo constituent (0.001 to 0.16 wt % in terms of MoO3), and a Ga constituent (0.001 to 15 wt % in terms of Ga2O3).

Abstract: An composition exhibiting a desired value of magnetic susceptibility, which can be used to fabricate components in an NMR device, and method thereof, wherein the composition comprises a metal ion selected from the group consisting of Gd+3, Fe+3 and Mn+2 and an amorphous material using a ligand or chelating agent to solubilize the metal ion throughout the marphous material, wherein the magnetic susceptibility of the composition exhibits a desired value at cryogenic temperatures such as nearly zero susceptibility at temperatures at or below 77° K.

Abstract: Improved resin-bonded powdered metal components are protected against corrosion and reduction of crush strength during contact with corrosive fluids such as alcohols, ethanol-containing fuels, glycols and peroxide-containing fuels by a resin system coating that, when cured, provides a relatively high crosslink density and relatively few hydrolysable radicals. Magnetic properties of resin-bonded powdered metal magnets are protected from heat degradation by the cured resin coating. The coating can be a heat-cured resin system comprising a phenol novolac resin and a compatible hardener. In one embodiment magnetizable powdered materials have an uncured resin system coating to provide a B-stage material that can be cured after compression shaping.

Abstract: The present invention provides a ferrite magnet material comprising, as a main phase, a ferrite having a hexagonal structure, the main phase containing A, La, R, Fe and Co, wherein A is at least one element selected from Sr, Ba and Pb, R is Pr and/or Nd, and the proportions of the total metal elements A, La, R, Fe and Co in the main phase are respectively A: 1 to 13 atomic %, La: 0.003 to 10 atomic %, R: 0 to 10 atomic % (excluding 0) Fe: 80 to 95 atomic % and Co: 0.05 to 5 atomic % based on the total amounts of metal elements. The residual magnetic flux density Br and coercive force HcJ can be improved without increasing the content of Co by incorporating Pr and/or Nd along with La and Co in the ferrite magnet material.

Abstract: The long magnet includes a magnet block made of a mixture of rare earth magnetic powder, thermoplastic resin particles, fluidity additive, pigment, wax and charge control agent, and a reinforcing member to reinforce the magnet block. At least part of the reinforcing member is arranged inside of the magnet block.

Abstract: One aspect of the present invention relates to a permanently linked, rigid, magnetic chain of particles prepared by sol-gel methods. A second aspect of the present invention relates to a method of preparing a permanently linked, rigid, magnetic chain of particles comprising: coating a core material with one or more polyelectrolyte layers resulting in a coated particle; further coating the coated particle with a layer of magnetic nanoparticles resulting in a magnetic particle; coating the magnetic particle with a layer of a polycationic polyelectrolyte resulting in a coated magnetic particle; and applying a magnetic field to the coated magnetic particle in the presence of a metal oxide or metal oxide precursor capable of undergoing hydrolysis.

Abstract: A of producing a magnetic garnet material of which the light absorption characteristics worsen little even though it is produced through LPE. The crucible for LPE is formed of a material containing Au. The amount of Au to be taken in single crystal formed in an Au crucible is smaller than that of Pt to be taken therein formed in a Pt crucible. As compared with Pt, the influence of Au on magnetic garnet film that increases the insertion loss in the film is small.

Abstract: A ferrite sintered body is composed of an oxide containing, as metal element, at least Fe and Zn and at least one selected from Ni, Cu and Mn. This sintered body contain Fe of 42 to 50 mol % in terms of Fe2O3, and Zn of 15 to 35 mol % in terms of ZnO. When the Zn concentration in the sintered body interior is taken to be 1, the Zn concentration in the surface vicinity is 0.8 to 12. This increases the surface resistance of the ferrite sintered body and lowers its core loss.

Abstract: A magnetic refrigeration material has magnetic material particles with a magnetocaloric effect and an oxidation-resistant film formed on the surfaces of the magnetic material particles.

Abstract: The invention is directed to a magnetic thick film composition comprising particles of permanent magnetic materials dispersed in organic medium wherein the medium comprises a polymer selected from polyurethane, phenoxy and mixtures thereof, and organic solvent.

Abstract: A Faraday rotator in which the isolation function based on a temperature rise is not deteriorated even when the Faraday rotator is used for a high output laser of not smaller than 1W output at a wavelength of not larger than 1.1 ?m includes sapphire crystals or rutile crystals bonded as radiation substrates to the incident side and outgoing side of a bismuth substituted type rare earth metal iron garnet crystal (RIG) film, the thickness of the RIG film being not smaller than 130 ?m and not larger than 200 ?m.

Abstract: Provided are new compositions of ruthenates in the pervoskite and layered pervoskite family, wherein the ruthenate compositions exhibit large magnetoresistance (MR) and electric-pulse-induced resistance (EPIR) switching effects, the latter observable at room temperature. This is the first time large MR and EPIR effects have been shown together in ruthenate compositions. Further provided are methods for synthesizing the class of ruthenates that exhibits such properties, as well as methods of use therefor in electromagnetic devices, thin films, sensors, semiconductors, insulators and the like.

Abstract: A ferrite magnet having a basic composition represented by the following general formula: (A1?xRx)O.n[(Fe1?yMy)2O3] by atomic ratio, wherein A is Sr and/or Ba, R is at least one of rare earth elements including Y, M is at least one element selected from the group consisting of Co, Mn, Ni and Zn, and x, y and n are numbers meeting the conditions of 0.01?x?0.4, [x/(2.6n)]?y?[x/(1.6n)], and 5?n?6, and substantially having a magnetoplumbite-type crystal structure, is obtained by uniformly mixing a compound of Sr and/or Ba with an iron compound; calcining the resultant uniform mixture; adding a compound of the R element and/or the M element to the resultant calcined powder at a pulverization step thereof; and sintering the resultant mixture. The compound of the R element and/or the M element may be added at a percentage of more than 0 atomic % and 80 atomic % or less, on an element basis, at a mixing step before calcination.

Abstract: Proposed is a technique of producing a magnetic garnet material of which the light absorption characteristics worsen little even though it is produced through LPE. The crucible for LPE is formed of a material containing Au. The amount of Au to be taken in single crystal formed in an Au crucible is smaller than that of Pt to be taken therein formed in a Pt crucible. As compared with Pt, the influence of Au on magnetic garnet film that increases the insertion loss in the film is small.

Abstract: A composite magnetic material contains first magnetic particles made of a first magnetic material and second magnetic particles made of a second magnetic material, the first and second magnetic particles being mixed with each other. A frequency characteristic of the first magnetic material is different from that of the second magnetic material. The first and second magnetic particles are mixed so that, at a frequency of an intersecting point between a first curve representing a frequency characteristic of a real part of a complex magnetic permeability of the first magnetic material and a second curve representing a frequency characteristic of a real part of a complex magnetic permeability of the second magnetic material, a value of a real part of a complex magnetic permeability of the composite magnetic material is larger than a value of the intersecting point.

Abstract: A magnetron comprising an anode portion having an anode cylinder and vanes, a cathode portion having a coil-shaped filament, magnetic poles disposed at the upper and lower ends of the filament, ring-shaped permanent magnets made of a Sr ferrite magnet containing La—Co, an input portion and an output portion. The diameter ?a of the inscribed circle at the ends of the vanes constituting the anode portion is in the range of 7.5 to 8.5 mm, and the outside diameter ?c of the coil-shaped filament 1 constituting the cathode portion is in the range of 3.4 to 3.6 mm.

Abstract: A magnetic device and method for making it involve a magnetic device specifically constructed of grains in a matrix. The matrix may be cement or plaster. The grains have an average diameter that is greater than their magnetic domains. The device may be applied to shielding applications for frequencies ranging from 100 kHz to 10 GHz. The shielding may be applied to walls of a building, consumer products such as magnetic disks, and the like. The grains may be any ferromagnetic material, including ferrite.

Abstract: A ferrite magnet obtained by adding at least one element selected from the group consisting of Co, Ni, Mn and Zn to a ferrite having a hexagonal M-type magnetoplumbite structure, in which a portion of Sr, Ba, Pb or Ca is replaced with at least one element that is selected from the group consisting of the rare-earth elements (including Y) and Bi and that always includes La, during the fine pulverization process thereof, and then subjecting the mixture to re-calcining and/or sintering process(es). By adding a small amount of the element such as Co, Ni, Mn or Zn to the ferrite already having the hexagonal M-type magnetoplumbite structure during the fine pulverization process thereof, the magnetic properties can be improved.

Abstract: A ferrite magnet obtained by adding a ferrite having a spinel-type structure to a ferrite having a hexagonal M-type magnetoplumbite structure, in which a portion of Sr, Ba, Pb or Ca is replaced with at least one element that is selected from the group consisting of the rare-earth elements (including Y) and Bi and that always includes La, during the fine pulverization process thereof. By adding a small amount of the element such as Co, Ni, Mn or Zn to the ferrite already having the hexagonal M-type magnetoplumbite structure during the fine pulverization process thereof, the magnetic properties can be improved.

Abstract: A non-reciprocal device includes at least one ferrimagnetic member (21 or 22). By controlling the FMR linewidth ?H of the ferrimagnetic members (21 and 22), intermodulation distortion is controlled.