Abstract: Rectangular parallelopipedic lepidocrocite particles of the present invention have a minor axial diameter of 0.045 to 0.5 .mu.m, a major axial diameter of 0.05 to 1.0 .mu.m, and a thickness of 0.001 to 0.3 .mu.m, which are individual. Such rectangular parallelopipedic lepidocrocite particles according to the present invention are firstly used as a coloring pigment for paints, resin moldings, printing ink, road asphalt, cosmetics, etc., and secondly used as a non-magnetic material for non-magnetic undercoat layers which are formed on non-magnetic substrates which constitute a substrate for magnetic recording media, and which have an excellent surface smoothness and a high strength.

Abstract: A magnetic recording medium is formed by depositing a Cr-containing sub-underlayer on a surface oxidized seed layer, such as NiP, with direct current (DC) magnetron sputtering, depositing a NiAl or FeAl underlayer on the sub-underlayer, and depositing a Cr-containing intermediate layer on the NiAl or FeAl underlayer. The medium features high coercivity, low noise, and (200)-dominant underlayer crystallographic orientation, even with sub-underlayer deposition at temperatures as low as about 25.degree. C. The medium is suitable for high density longitudinal magnetic recording.

Abstract: The object of the invention is a magnetic arrangement for the treatment of surface near skin or tissue areas of the human body having several mechanically connected magnetic bodies (M.sub.1, M.sub.2) which build an active surface on, or in, the vicinity of which the magnetic field there present is utilized. Use has long been made in therapeutics of flexible magnets of plastic bonded hard ferrite having at least one North and one South pole on their active surface facing the body, whereby the pole configurations are arranged in different ways dependent upon the therapeutic objective. It is thus possible to generate magnetic inductions only in surface near skin or tissue areas. A magnetic arrangement of several magnetic bodies of high coercive field strength with different energy densities is proposed to attain locally restricted higher magnetic inductions.

Abstract: Compositions having good low temperature impact performance made from a thermoplastic (e.g., a polyolefin such as polypropylene) and either at least one linear ethylene/C.sub.5 -C.sub.20 .alpha.-olefin or at least one substantially linear ethylene/C.sub.3 -C.sub.20 .alpha.-olefin polymer are disclosed. The compositions are easily molded and have particular utility in making automotive facia, parts and other household articles.

Abstract: The lubricant layer according to the present invention is used in a thin film magnetic recording medium in which a solid surface sliding at a high speed is required to retain its lubricating performance and abrasion resistance for a long period of time, comprising a host-guest complex composed of a lubricant molecule as a guest molecule and a multidentate ligand as a host compound to form the complex with the guest molecule.

Abstract: A magnetic multilayer film having magnetoresistance (MR) is prepared by depositing at least two magnetic thin films having different coercive forces while interposing a non-magnetic thin film therebetween. A first magnetic thin film having a lower coercive force has a squareness ratio SQ.sub.1 of 0.01-0.5, an anisotropic magnetic field Hk of 1-20 Oe, and a thickness t.sub.1, a second magnetic thin film having a higher coercive force has a squareness ratio SQ.sub.2 of 0.7-1.0 and a thickness t.sub.2 .ltoreq.t.sub.1, and the non-magnetic thin film has a thickness t.sub.3 .ltoreq.200 .ANG.. A first preferred form requires 4 .ANG..ltoreq.t.sub.2 <30 .ANG. and 6 .ANG..ltoreq.t.sub.1 .ltoreq.200 .ANG.. A second preferred for requires 4 .ANG..ltoreq.t.sub.2 <20 .ANG. and 10 .ANG..ltoreq.t.sub.1 <20 .ANG.. A third preferred form requires 4 .ANG..ltoreq.t.sub.2 <30 .ANG. and 6 .ANG..ltoreq.t.sub.1 .ltoreq.40 .ANG..

Abstract: A magnetic recording medium of the present invention includes: a non-magnetic substrate; a ferromagnetic thin metal layer formed on the non-magnetic substrate; and a carbon layer and a lubricant layer in contact with the carbon layer, which is formed above the ferromagnetic thin metal layer so that the lubricant layer is an outermost layer, wherein the carbon layer contains nitrogen atoms, a Raman spectrum of the carbon layer has a peak A in the range of about 1310 to about 1410 cm.sup.-1 and a peak B in the range of about 1520 to about 1570 cm.sup.-1, and a ratio of integrated intensities of the peak A to the peak B is in the range of about 1.2 to about 2.0.

Abstract: A large number of magnetic polymer elements are distributed at random in a base material of a object to be checked. Each magnetic polymer element includes an element main body formed of a high-molecular material, such as an acrylic resin, and magnetic metal powder contained therein. The base material is formed mainly of paper, and the magnetic polymer elements are incorporated together with wood pulp fibers in the base material. The elements and the fibers are tangled with one another in three dimensions. Indication data including figures, symbols, etc., such as post position numbers and bet numbers on betting tickets for publicly-managed gambling, are printed on the object.

Abstract: It is an object of the present invention to provide a magnetoresistance effect element which has a film with a spin valve structure or an artificial lattice film having good soft magnetic characteristics, and which can be applied to a high-sensitivity magnetic head. The present invention provides a magnetoresistance effect element including a stacked film formed on a substrate by sequentially stacking a ferromagnetic film containing as its main constituents at least one elements selected from the group consisting of Co, Fe, and Ni, a nonmagnetic film, and the ferromagnetic film, wherein the two ferromagnetic films are not coupled with each other, and the closest packed plane of each ferromagnetic film is oriented in a direction perpendicular to the film surface.

Abstract: The sulfobetaine-containing resin has much improved affinity for magnetic powders. Therefore, by using the same as a binder, it becomes possible to attain good dispersion of magnetic powders superfine in particle size and/or large in amount of magnetization.The binder can be used advantageously in the manufacture of magnetic recording media, such as magnetic tapes and magnetic disks.

Abstract: A biaxially oriented polyester film for magnetic recording media, which comprises:(A) 0.05 to 1.0% by weight of .theta.-aluminum oxide or mixed (.alpha.+.gamma.) aluminum oxide having an average particle diameter in the range of from 0.02 to 0.3 .mu.m and a specific surface area in the range of from 50 to 120 m.sup.2 /g, and(B) 0.01 to 1.5% by weight of inert particles having an average particle diameter which is in the range of from 0.1 to 1.5 .mu.m and greater than the average particle diameter of the aluminum oxide.

Abstract: A magnetic recording medium and method of manufacture therefor uses a vertically magnetized film (4) backed by a nonmagnetic substrate (1) made of e.g., glass; a Permalloy.RTM. layer is interposed between the magnetized film and the substrate. An additional layer (3) of a soft amorphous magnetic material, e.g. Co-Zr-Nb or Co-Zr of a suitable thickness (e.g. 50 nm) is interposed between the vertically magnetized medium and the Permalloy.RTM. layer for improving crystalline orientation of the vertically magnetized film and the Permalloy.RTM. layer. The additional layer (3) may be deposited by high frequency sputtering while applying a magnetic field othogonal to the substrate.

Abstract: An improved CoPt based or CoNi based alloy magnetic recording disk for horizontal recording has a magnetic recording layer which is a laminated structure of relatively thin magnetic alloy films separated by relatively thin non-magnetic spacer films. The resulting laminated disk structure has substantially decreased intrinsic media noise at high linear recording densities. A magnetic recording disk drive uses the low noise laminated disk and and a magnetoresistive read sensor to provide a disk drive with significantly reduced noise in the data readback signal.

Abstract: The high density slave magnetic recording media comprising on a non-magnetic substrate a magnetic recording layer coated with magnetic hexagonal ferrite powder along with a binder component to transfer the digital signals stored on the master magnetic recording media by the magnetic contact duplication process, is characterized in that the perpendicular squareness ratio of the magnetic recording layer is not less than 0.58 and is less than 0.7, center line average roughness Ra is not more than 0.01 .mu.m, and the number of convex projections whose pitches are 10 to 90 .mu.m and whose height is not less than 0.03 .mu.m pp (bottom to top) is not more than 10 per 1 mm of running direction. The slave magnetic recording media permits the functionally enough duplication efficiency of digital signals by the magnetic contact duplication process and can considerably curb the error rate during the reproduction of the duplicated digital signals.

Abstract: A method for manufacturing a magnetic paint by mixing a resin composition powder as a dispersing binder for a magnetic powder with the magnetic powder, or together with a filler, and grinding the mixture under a high shear stress is disclosed. A magnetic recording medium such as a magnetic disk, etc., prepared by using the magnetic paint, can have a magnetic coating film having a substantially uniform film thickness of not more than 0.9 .mu.m and a surface roughness of not more than 0.05 .mu.m Ra before surface finishing.

Abstract: A magnetic record medium comprises(A) a nonmagnetic substrate,(B) a layer consisting essentially of a ferromagnetic metal on at least one side of the substrate,(C) a layer containing carbon on the layer of (B),(D) a layer comprising a primary or secondary organic amine containing at least one substituent having a fluorinated hydrocarbon group at the end of the substituent on the layer of (C), and(E) a layer comprising at least one lubricant having a plurality or fully fluorinated hydrocarbon group on one end of the molecule and a functional group selected from the group consisting of --OH, --SH, --COOH, --COSH and --CONH.sub.2 on the other end of the molecule on the layer of (D).

Abstract: A magnetic recording medium comprising a non-magnetic support having thereon plural magnetic layers comprising a fine ferromagnetic powder and a binder and which are composed of at least two magnetic layers. In preparing the medium, a first magnetic layer-coating composition containing an epoxy compound having at least two epoxy groups is coated on the nonmagnetic support and a second magnetic layer-coating composition containing a polyisocyanate compound is coated over the first magnetic layer with a simultaneous or successive multiple layered coating method. The medium has an excellent electromagnetic characteristic and yields few dropouts, and it is usable as a medium for high density recording.

Abstract: A magnetic recording medium comprises a non-magnetic substrate and a magnetic recording layer provided on said substrate, comprising (a) 100 parts by weight of magnetic powder, (b) 5 to 15 parts by weight of a mixture of a fatty acid ester and a fatty acid in their weigh ratio of 60/40 to 95/5 and (c) 5 to 15 parts by weight of carbon black having an average diameter of a single particle in the range of 0.1 to 2.0 microns. The magnetic power has been preferably treated on the surface with (1) a phosphate or an alkenyl or alkyl succinic acid and (2) an organosilane compound having a hydrolyzable alkoxysilane group in a molecule.

Abstract: Disclosed herein is a magnetic recording medium having a magnetic layer comprising hexagonal ferrite magnetic particles each expressed as BaO.multidot.Fe.sub.12-x-y Sn.sub.x Mg.sub.y O.sub.18 (where, 0.55.ltoreq.x.ltoreq.0.88, 0.71.ltoreq.y.ltoreq.1.05). The hexagonal ferrite magnetic particles contained in this magnetic layer each have Sn and Mg partially substituted for Fe, the Sn and Mg being perfectly solid-soluble, thus being capable of providing hexagonal ferrite magnetic particles which are superior in crystalline properties and small in variation of composition. As a result, the coercivity distribution can be made further sensitive, both the self demagnetization and recording demagnetization in the short wave-length range can be reduced, and a higher reproducing output characteristic is attainable in the high density recording range.

Abstract: A medium recording medium is provided which has a plurality of coated layers on a nonmagnetic base support, a least one of said coated layer containing a modified copolymer having introduced therein an anionic functional group which forms an intramolecular salt.