Abstract: A magnetic recording medium is provided and includes a layer structure including a magnetic layer, a non-magnetic layer, and a base layer in order, in which an average thickness tT of the magnetic recording medium is 4.0 ?m?tT?5.3 ?m, a dimensional variation ?w in a width direction of the magnetic recording medium to tension change in a longitudinal direction of the magnetic recording medium is 680 ppm/N??w?2000 ppm/N, and an average thickness tn of the non-magnetic layer is tn?1.0 ?m.

Abstract: A magnetic sheet according to the present invention contains Mn—Zn ferrite as a main component and is comprising of a sheet-shaped sintered body. In this magnetic sheet, a difference |?s??c| between a residual stress ?s in a surface layer portion and a residual stress ?c in a central portion at a cross section is 20 MPa or less in absolute value.

Abstract: A magnetic recording tape, in accordance with one aspect of the present invention, includes a substrate, an underlayer formed above the substrate, and a magnetic recording layer formed above the underlayer. The underlayer includes first encapsulated nanoparticles each comprising a first magnetic nanoparticle encapsulated by a first aromatic polymer, and a first polymeric binder binding the first encapsulated nanoparticles. The recording layer includes second encapsulated nanoparticles each comprising a second magnetic nanoparticle encapsulated by an encapsulating layer, and a second polymeric binder binding the second encapsulated nanoparticles.

Abstract: An object of the present invention is to more conveniently provide a copolyester for a polyester film which exhibits excellent dimensional stability and in particular excellent dimensional stability against environmental changes in, for example, temperature and humidity, and has a small film elongation percentage at 110° C. A copolyester of the present invention comprises: (A) an aromatic dicarboxylic acid component; (B) an alkylene glycol component; and (C1) a dimer acid component and/or (C2) a dimer diol component, wherein the copolyester contains, with reference to a molar number of a total dicarboxylic acid component, 0.5 to 3.5 mol % of the dimer acid component (C1) and/or 0.3 to 5.0 mol % of the dimer diol component (C2).

Abstract: An electrical composite assembly includes a plurality of composite material macro-wires each including a magnetic material embedded within a nonmagnetic matrix. The magnetic material can be selected from magnetic microwires, magnetic nanowires, chains of magnetic nanoparticles, and chains of magnetic microparticles. The plurality of composite material macro-wires are included in an electrical component, where the electrical component is selected from a rotor, a stator, and an electromagnetic shield.

Abstract: A deformable structure includes a first deformable layer, and a material of the first deformable layer includes a deformable material. The deformable material includes a plurality of sheet structures that are stacked, and each sheet structure includes a plurality of aldolases. A molecular model of an aldolase is equivalent to a square on a plane where the sheet structure is located, and the aldolase has amino acid residues at each of four corners thereof. In one sheet structure, amino acid residues at four corners of each aldolase are connected to amino acid residues of four aldolases around the aldolase through four disulfide bonds, respectively. In two adjacent sheet structures, amino acid residues of two adjacent aldolases are connected through at least one disulfide bond.

Abstract: A magnetoresistive effect element includes: a first ferromagnetic layer; a second ferromagnetic layer; and a non-magnetic layer located between the first ferromagnetic layer and the second ferromagnetic layer, wherein a crystal structure of the non-magnetic layer is a spinel structure, wherein the non-magnetic layer contains Mg, Al, X, and O as elements constituting the spinel structure, and wherein the X is at least one or more elements selected from a group consisting of Ti, Pt, and W.

Abstract: An alkali-free glass substrate contains, as represented by mass % based on oxides: 54% to 68% of SiO2; 10% to 25% of Al2O3; 0.1% to 5.5% of B2O3; and 8% to 26% of MgO+CaO+SrO+BaO. The alkali-free glass substrate has ?-OH of 0.15 mm?1 to 0.35 mm?1, and a Cl content of 0.15 to 0.3 mass %. A bubble growth index I of the alkali-free glass substrate given by the following formula is 320 or more: I=590.5×[?-OH]+874.1×[Cl]?5.7×[B2O3]?33.3. In the formula, [?-OH] is ?-OH of the alkali-free glass substrate in mm?1, [Cl] is the Cl content of the alkali-free glass substrate in mass %, and [B2O3] is a B2O3 content of the alkali-free glass substrate in mass %.

Abstract: An electronic component includes a composite body composed of a composite material of a resin and a magnetic metal powder and a metal film disposed on an outer surface of the composite body. The magnetic metal powder contains Fe. The metal film mainly contains Ni and is in contact with the resin and the magnetic metal powder.

Abstract: A magnetic-disk glass substrate contains an alkaline earth metal component as a glass composition and includes a pair of main surfaces, and an outer circumferential side edge surface that is a mirror surface. The outer circumferential side edge surface includes a surface having a roughness percentage of 40% or more and 68% or less when a bearing ratio of a roughness cross-sectional area is 50% in a bearing ratio curve of roughness cross-sectional areas obtained when a surface roughness of the outer circumferential side edge surface obtained after the outer circumferential side edge surface is etched by 2.5 ?m is measured. A glass transition point of the glass composition that constitutes the magnetic-disk glass substrate is 700° C. or more. The glass composition that constitutes the magnetic-disk glass substrate is alkali-free glass.

Abstract: The invention provides a composition for glass, a glass, and a preparation method and application thereof. On an oxide basis, the composition for glass contains 45-64 wt % SiO2, 16-26 wt % Al2O3, 0.1-2 wt % MgO, 10-17 wt % Na2O, 0.5-15 wt % P2O5, and optionally 0-2 wt % TiO2. The glass prepared from the composition for glass has a higher chemical resistance, a higher strain point, and a higher compressive stress and depth of compressive stress layer formed on the glass surface, and the glass has a higher Young's modulus.

Abstract: A magnetic sheet according to the present invention contains Mn—Zn ferrite as a main component and is comprising of a sheet-shaped sintered body. In this magnetic sheet, a difference |?s??c| between a residual stress ?s in a surface layer portion and a residual stress ?c in a central portion at a cross section is 20 MPa or less in absolute value.

Abstract: The invention provides a polyester composition in which the primary repeating units contain an aromatic dicarboxylic acid component (Component A) and an ethylene glycol component (Component C) and a long-chain alkyl dicarboxylic acid component having not less than 6 carbons (Component B) or a long-chain alkyl diol component having not less than 6 carbons (Component D), wherein a sum (WB+WD) of a relative amount (WB) of Component B as calculated based on a total number of moles of Component A and Component B plus a relative amount (WD) of Component D as calculated based on a total number of moles of Component C and Component D are within a range of 2-13 mol %. The invention also provides a polyester film prepared from the polyester composition and having excellent dimensional stability, as well as a magnetic recording medium utilizing the polyester film.

Abstract: The magnetic tape includes a non-magnetic support, a magnetic layer that includes ferromagnetic powder having an average particle volume of 2,500 nm3 or less on one surface side of the non-magnetic support, and a back coating layer that includes non-magnetic powder on the other surface side of the non-magnetic support, in which the ferromagnetic powder is ferromagnetic powder selected from the group consisting of hexagonal ferrite powder and ?-iron oxide powder, and a ratio (PSD5?m-PSDmag/PSD10?m-PSDbc) of the magnetic layer and the back coating layer is in a range of 0.0050 to 0.20. A magnetic tape cartridge and a magnetic recording and reproducing apparatus include the magnetic tape.

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: According to an aspect, a soft magnetic metal powder includes a plurality of soft magnetic metal particles containing iron, a surface of each of the soft magnetic metal particles is covered with a coating part, and a maximum height Sz of a surface of the coating part is 10 to 700 nm. According to another aspect, a soft magnetic metal powder includes a plurality of soft magnetic metal particles containing iron, a surface of each of the soft magnetic metal particles is covered with a coating part, and a maximum height Rz of a surface of the coating part is 10 to 700 nm.

Abstract: The magnet is a ferrite sintered magnet containing a ferrite phase having a magnetoplumbite-type crystal structure. The ferrite sintered magnet contains at least Ca, a metal element A, a metal element R, Bi, Fe, and a metal element M. The metal element A is at least one kind of element selected from the group consisting of Sr, Ba, and Pb, the metal element R is at least one kind of element selected from the group consisting of rare-earth elements including Y and essentially includes La, the metal element M is at least one kind of element selected from the group consisting of Co, Ni, Zn, Al, Cu, and Cr, and essentially includes Co, and when an atonic ratio of the metal elements is expressed by Formula (1), c, a, r, b, f, and m in Formula (1) satisfy the following Expressions (2) to (8).

Abstract: A substrate for a magnetic disk includes a substrate main body having two main surfaces and an outer circumferential edge surface that has a side wall surface and chamfered surfaces, and a film that is an alloy film containing Ni and P and provided on a surface of the substrate main body. A disk shape of the substrate main body has an outer diameter of 90 mm or more. A thickness T of the substrate that includes the film provided on the main surfaces is 0.520 mm or less. A total thickness D mm of the film on the main surfaces and the thickness T mm satisfy D?0.0082/T?0.0015. A film thickness of the film on the outer circumferential edge surface is larger than a film thickness of the film on the main surfaces, and is 150% or less of the film thickness of the film on the main surfaces.

Abstract: A spin-orbit torque (SOT) magnetic tunnel junction (MTJ) device includes a substrate, a buffer layer formed over the substrate, and a bismuth antimony (BiSb) layer formed over the buffer layer, the BiSb layer having a (012) orientation. In certain embodiments, the SOT MTJ device is part of a microwave assisted magnetic recording (MAMR) write head. In certain embodiments, the SOT MTJ device is part of a magnetoresistive random access memory (MRAM) device.

Abstract: A magnetic domain wall moving element according to an embodiment includes: a magnetic recording layer, a ferromagnetic layer, and a non-magnetic layer arranged between the magnetic recording layer and the ferromagnetic layer, wherein the ferromagnetic layer contains an additive element dispersed therein, and the additive element is one or more of H, He, Ne, Ar, Kr, Xe, N, C, Ag, Cu, Hg, Au, Pb, Zn, and Bi.