Abstract: A lubricating agent including an ionic liquid formed from a Bronsted acid (HX) and a Bronsted base (B), wherein the Bronsted base has a linear hydrocarbon group having 10 or more carbon atoms and the difference between the pKa value of the Bronsted acid in water and the pKa value of the Bronsted base in water is 12 or more.

Abstract: A perpendicular type of magnetic recording medium has a multi-layered recording structure made up of a plurality of ferro-magnetic layers and a non-magnetic layer interposed between the plurality of ferro-magnetic layers, and the perpendicular magnetic anisotropy energy of the lower ferro-magnetic layer is greater than the perpendicular magnetic anisotropy energy of the upper ferro-magnetic layer. Accordingly, the lower ferro-magnetic layer may be easily magnetically reversed by a magnetic field applied during a write operation. Thus, the perpendicular type of magnetic recording medium exhibits an enhanced thermal stability and write-ability.

Abstract: A magnetic stack includes a interlayer structure and a magnetic recording layer disposed over the interlayer in the magnetic stack. The magnetic recording layer includes substantially ordered L10, <001> oriented crystalline magnetic grains laterally separated by a nonmagnetic, segregant material. The interlayer structure comprises a first layer having cubic crystal structure including <100> oriented crystalline grains and a second layer having crystalline grains laterally separated by a segregant material. The crystalline grains of the second layer are arranged in substantially vertically contiguous alignment with the crystalline grains of the first layer and the segregant material of the magnetic recording layer is arranged in substantially vertically contiguous alignment with the segregant material of the second layer.

Abstract: The magnetic tape comprises, on a nonmagnetic support, a nonmagnetic layer comprising nonmagnetic powder and binder, and on the nonmagnetic layer, a magnetic layer comprising ferromagnetic powder, nonmagnetic powder, and binder, wherein a total thickness of the magnetic tape is less than or equal to 4.80 ?m, and a coefficient of friction as measured on a base portion of a surface of the magnetic layer is less than or equal to 0.35.

Abstract: Magnetic memories and methods are disclosed. A magnetic memory as described herein includes a plurality of stacked data storage layers to form a three-dimensional magnetic memory. The data storage layers are each formed from a multi-layer structure. At ambient temperatures, the multi-layer structures exhibit an antiparallel coupling state with a near zero net magnetic moment. At higher transition temperatures, the multi-layer structures transition from the antiparallel coupling state to a parallel coupling state with a net magnetic moment. At yet higher temperatures, the multi-layer structure transitions from the antiparallel coupling state to a receiving state where the coercivity of the multi-layer structures drops below a particular level so that magnetic fields from write elements or neighboring data storage layers may imprint data into the data storage layer.

Abstract: A kind of hydrophobic flame-retardant fiber and a preparation method thereof are provided by the present invention. The fiber has a skin-core structure, wherein, the volume ratio of skin to core is in a range of 2:8-6:4; weight percentages of compositions of skin layer material include: 79.9%-88.8% of PET (polyethylene terephthalate), 8%-13% of PVDF (polyvinylidene fluoride), 3%-6% of flame-retardant agent, 0.1%-0.5% of compatibilizer, 0.1%-0.6% of coupling agent; weight percentages of compositions of core layer material include: 91%-95% of PET, 5%-9% of flame-retardant agent.

Abstract: This invention relates to a magnetic composite powder, a method of preparing the same and an electromagnetic noise suppressing film comprising the same. The magnetic composite powder and the electromagnetic noise suppressing film can effectively suppress unwanted electromagnetic waves emitted by various parts of an advanced digital device having high performance characteristics in terms of speed, frequency and functionality.

Abstract: A perpendicular recording medium with enhanced magnetic stability. In accordance with some embodiments, a multi-layer recording structure is formed on a base substrate and adapted to magnetically store a magnetic bit sequence in domains substantially perpendicular to said layers. A thin magnetic stabilization layer is formed on the multi-layer recording substrate to magnetically stabilize an upper portion of the recording structure.

Abstract: The present invention concerns fiber made from a polymer comprising imidazole groups, the polymer further having: i) halide anions being present in an amount in the range of 0.05 to 20.1 weight percent, based on weight of fiber; ii) sulfur, wherein the sulfur is present in the fiber in an amount in the range of 0.05 to 3 weight percent, based on weight of fiber; and iii) alkali metal ion, wherein the alkali metal ion is present in the fiber in an amount in the range of 0.05 to 2 weight percent, based on weight of fiber.

Abstract: A data storage medium having a seed structure formed of a first seed layer comprising a nickel alloy NiY, where Y is an element selected from Al, B, Fe, Nb, W, and Co, and a second seed layer represented by NiWAX, where A is an element selected from Al, B, Fe, Nb, and Co, and X is either B, Si, Ti, Nb, V, Cr, Ru, or an oxide, with the second seed layer being disposed on the first seed layer; and a magnetic recording layer above the seed structure. In addition, a method for manufacturing a data storage medium containing the aforementioned seed structure is also disclosed.

Abstract: The present invention concerns fiber made from a polymer comprising imidazole groups, fiber further having: i) a halide anion, the halide anion being present in an amount of 0.05 to 20.1 weight percent, based on weight of fiber; and ii) sulfur, wherein the sulfur is present in the fiber in an amount of 0.05 to 3 weight percent.

Abstract: The magnetic recording medium comprises a magnetic layer comprising ferromagnetic powder and binder on a nonmagnetic support, and further comprises a compound denoted by Formula (1): wherein, in Formula (1), X denotes —O—, —S—, or NR1—; each of R and R1 independently denotes a hydrogen atom or a monovalent substituent; L denotes a divalent connecting group; Z denotes a partial structure of valence n comprising at least one group selected from the group consisting of carboxyl groups and carboxylate groups; m denotes an integer of greater than or equal to 2, and n denotes an integer of greater than or equal to 1.

Abstract: Provided is a flame retardant resin composition including a base resin, calcium carbonate particles that are incorporated at a proportion of 10 parts by mass or more relative to 100 parts by mass of the base resin, a silicone-based compound that is incorporated at a proportion of more than 1 part by mass relative to 100 parts by mass of the base resin, and a fatty acid-containing compound that is incorporated at a proportion of more than 3 parts by mass relative to 100 parts by mass of the base resin. The average particle size of the calcium carbonate particles is 0.7 ?m or larger.

Abstract: A magnetic disk of is provided, the magnetic disk having at least a magnetic layer, a carbon protective layer, and a lubrication layer sequentially provided on a substrate. In an embodiment, the lubrication layer a film formed by a lubricant having a perfluoropolyether compound A having a perfluoropolyether main chain in the structure and also having a hydroxyl group at the end and a compound C obtained from a reaction between a compound B expressed by: [Chemical formula 1] CF3(—O—C2F4)m-(O—CF2)n-OCF3 [m and n in the formula are natural numbers.] and aluminum oxide.

Abstract: A multilayer exchange spring recording media consists of a magnetically hard magnetic storage layer strongly exchange coupled to a softer nucleation host. The strong exchange coupling can be through a coupling layer or direct. The hard magnetic storage layer has a strong perpendicular anisotropy. The nucleation host consists of one or more ferromagnetic coupled layers. For a multilayer nucleation host the anisotropy increases from layer to layer. The anisotropy in the softest layer of the nucleation host can be two times smaller than that of the hard magnetic storage layer. The lateral exchange between the grains is small. The nucleation host decreases the coercive field significantly while keeping the energy barrier of the hard layer almost unchanged. The coercive field of the total structure depends on one over number of layers in the nucleation host. The invention proposes a recording media that overcomes the writeability problem of perpendicular recording media.

Abstract: The present invention provides a conjugated fiber suitable for use as a crimped fiber capable of producing an artificial leather having highly dense texture and good quality. The present invention also provides a base body for an artificial leather and an artificial leather produced by using such conjugated fiber. The conjugated fiber of the present invention includes a conjugated fiber comprising a readily soluble polyester component and a less readily soluble component, and the readily soluble polyester component comprises a copolymerized polyester having 5 to 10% by mole of 5-sodium sulfoisophthalate copolymerized therewith and the readily soluble polyester component contains a polyalkylene glycol. The polyalkylene glycol is in the form of streaks extending in longitudinal direction of the fiber in the longitudinal cross section of the conjugated fiber.

Abstract: Methods and media structures are provided for increasing writability and reducing unintentional erasure of perpendicular magnetic recording media. Variable permeability is controlled within a thin soft underlayer (SUL) structure, independent of bulk SUL material properties such as magnetic moment (Bs) and magnetic anisotropy (Hk). Media with an improved combination of easier writability on the recorded track and difficult erasure off-track (between tracks and on neighboring tracks) is achieved, in part, by an unbalanced antiferromagnetically coupled (AFC) SUL structure. A permeability gradient is established within the soft underlayer with layers having different values of permeability and magnetic thickness (Bs*t). In an aspect, a first SUL layer includes a high permeability region and an overlying low permeability region. A second layer antiferromagnetically couples the first layer to a low permeability third SUL layer.

Abstract: In one embodiment, a structure includes: a substrate; and a monolayer of nanoparticles positioned above the substrate, where the nanoparticles are each grafted to one or more oligomers and/or polymers, and where each of the polymers and/or oligomers includes at least a first functional group configured to bind to the nanoparticles. In another embodiment, a structure includes: a substrate; a structured layer positioned above the substrate, the structured layer comprising a plurality of nucleation regions and a plurality of non-nucleation regions; and a crystalline layer positioned above the structured layer, where the plurality of nucleation regions have a pitch in a range between about 5 nm to about 20 nm.

Abstract: The magnetic tape comprises a nonmagnetic layer comprising nonmagnetic powder and binder on a nonmagnetic support, and comprises a magnetic layer comprising ferromagnetic powder and binder on the nonmagnetic layer, wherein a fatty acid ester, a fatty acid amide, and a fatty acid are contained in either one or both of the magnetic layer and the nonmagnetic layer, with the magnetic layer and nonmagnetic layer each comprising at least one selected from the group consisting of a fatty acid ester, a fatty acid amide, and a fatty acid, a quantity of fatty acid ester per unit area of the magnetic layer in extraction components extracted from a surface of the magnetic layer with n-hexane falls within a range of 1.00 mg/m2 to 10.

Abstract: An object of the present invention is to provide a compound that is resistant to decomposition even when coming into contact with a magnetic head, while enabling a reduced spacing between the magnetic head and a magnetic disk, and to provide a lubricant comprising the compound, and a magnetic disk comprising the compound. The present invention relates to a compound represented by formula (1), a lubricant comprising the compound, and a magnetic disk comprising the compound: C6H6-i—[O—(CH2)n—O—CH2—R—CH2—X]i??(1) wherein n is an integer of 2 to 6; i is an integer of 2 or 3; X is a group represented by —OH, —O—(CH2)m—OH, —OCH2CH(OH)CH2OH, —OCH2CH(OH)CH2O—C6H5, or —OCH2CH(OH)CH2O—C6H4—OCH3; m is an integer of 1 to 6; R is —(CF2)pO(CF2O)x(CF2CF2O)y(CF2CF2CF2O)z(CF2CF2CF2CF2O)w(CF2)p—; x and y are each a real number of 0 to 30; z is a real number of 0 to 30; w is a real number of 0 to 20; and p is an integer of 1 to 3.