Abstract: Provided are a magnetic tape including: a non-magnetic support; and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, in which a total thickness of the magnetic tape is equal to or smaller than 5.30 ?m, the magnetic layer has a servo pattern, a center line average surface roughness Ra measured on a surface of the magnetic layer is equal to or smaller than 1.8 nm, and an absolute value ?N of a difference between a refractive index Nxy of the magnetic layer, measured in an in-plane direction and a refractive index Nz of the magnetic layer, measured in a thickness direction is 0.25 to 0.40, a magnetic tape cartridge and a magnetic tape apparatus including this magnetic tape, a magnetic tape cartridge and a magnetic tape apparatus including this magnetic tape.

Abstract: Provided are a magnetic tape including: a non-magnetic support; and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, in which a total thickness of the magnetic tape is equal to or smaller than 5.30 ?m, the magnetic layer has a servo pattern, a center line average surface roughness Ra measured on a surface of the magnetic layer is equal to or smaller than 1.8 nm, and an absolute value ?N of a difference between a refractive index Nxy of the magnetic layer, measured in an in-plane direction and a refractive index Nz of the magnetic layer, measured in a thickness direction is 0.25 to 0.40, a magnetic tape cartridge and a magnetic tape apparatus including this magnetic tape, a magnetic tape cartridge and a magnetic tape apparatus including this magnetic tape.

Abstract: Provided are a magnetic tape including: a non-magnetic support; and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, in which a total thickness of the magnetic tape is equal to or smaller than 5.30 ?m, the magnetic layer has a servo pattern, a center line average surface roughness Ra measured on a surface of the magnetic layer is equal to or smaller than 1.8 nm, and an absolute value ?N of a difference between a refractive index Nxy of the magnetic layer, measured in an in-plane direction and a refractive index Nz of the magnetic layer, measured in a thickness direction is 0.25 to 0.40, a magnetic tape cartridge and a magnetic tape apparatus including this magnetic tape, a magnetic tape cartridge and a magnetic tape apparatus including this magnetic tape.

Abstract: According to one embodiment, a magnetic recording medium includes a data region and a servo region adjacent to the data region and including a magnetic recording layer, the magnetic recording layer including first and second patterned regions adjacent to each other, the first patterned region including a first nonmagnetic matrix and first magnetic particles dispersed in the first nonmagnetic matrix and having magnetization oriented in a first direction, the second patterned region includes a second nonmagnetic matrix and second magnetic particles dispersed in the second nonmagnetic matrix and having magnetization oriented in a second direction opposite to the first direction, sizes of the first magnetic particles being smaller than sizes of the second magnetic particles.

Abstract: An apparatus includes a first seedlayer including a hexagonal close-packed alloy with a sigma phase addition, and an active layer including a plurality of quantum dots on the first seedlayer. The apparatus can further include a substrate, an adhesion layer on the substrate, and a wetting layer on the adhesion layer, wherein the first seedlayer is on the wetting layer.

Abstract: An aspect of the present invention relates to a radiation-curable vinyl chloride resin composition comprising a vinyl chloride resin containing a radiation-curable functional group, and/or starting material compounds thereof, as well as a benzoquinone compound.

Abstract: A magnetic recording medium is provided that includes a non-magnetic support, a radiation-cured layer cured by exposing a layer containing a radiation curing compound to radiation, and a magnetic layer comprising a ferromagnetic powder dispersed in a binder. The radiation-cured layer and the magnetic layer are provided in that order above the non-magnetic support. The radiation curing compound has a C2 to C18 alkyl group, a C6 to C10 cyclic structure, and two or more radiation curing functional groups per molecule.

Abstract: A magnetic recording medium is provided that comprises a non-magnetic support and, in order thereabove, a radiation-cured layer cured by exposing a layer comprising a radiation curing compound to radiation, and a magnetic layer comprising a ferromagnetic powder dispersed in a binder, the radiation curing compound having a radiation curing functional group in the molecule and being derived from a diisocyanate that has a branched structure but does not have a cyclic structure.

Abstract: A magnetic recording medium is provided that includes a support and at least one magnetic layer provided on or above the support, the magnetic layer including a ferromagnetic powder dispersed in a binder and at least one type of compound selected from Formulae (I) to (III) below; (in Formulae (I) to (III), each R independently denotes an alkyl group having 1 to 20 carbons).

Abstract: Epitaxial ferroelectric and magnetic recording structures having graded lattice matching layers are disclosed. A single crystal material such as Si may be used as a substrate material upon which the graded lattice matching layers are deposited. The lattice matching layers may comprise metals and metal alloys, or may comprise oxides doped with selected elements or deposited under different oxygen pressures. A recording layer, such as ferroelectric lead zirconium titanate or a magnetic Fe/Pt multilayer structure, is deposited on the graded lattice matching layers.

Abstract: A magnetic recording medium is provided that includes a non-magnetic support, a radiation-cured layer cured by exposing a layer containing a radiation curing compound to radiation, and a magnetic layer comprising a ferromagnetic powder dispersed in a binder. The radiation-cured layer and the magnetic layer are provided in that order above the non-magnetic support. The radiation curing compound includes a radiation curing polyester compound having four or more radiation curing functional groups per molecule.

Abstract: A magnetic tape medium having superior dimensional stability in the width direction and off-track resistance is provided although having a very high track width in the width direction. As a non-magnetic substrate of a magnetic tape medium in which the track density in the width direction is 50 tracks/mm or more, the off-track margin is 5 ?m or less, and the maximum permissible amount of change in dimension in the width direction caused by environment factors is 0.10% or less, a laminate composed of a plastic film and films provided on two surfaces thereof is used, the films being formed of a material selected from the group including a metal, a semi-metal, an alloy, and an oxide or composite formed of the aforementioned material, having a Young's modulus of 7×103 kg/mm2 or more and a coefficient of thermal expansion of 18×10?6/° C. or less.

Abstract: The present invention provides a magnetic recording medium wherein both of a reduction in the particle diameter of a ferromagnetic powder and an increase in the filling ratio of the powder in a magnetic layer are attained and the magnetic layer is excellent in surface smoothness and electromagnetic conversion property.

Abstract: A magnetic recording medium is provided that comprises a non-magnetic support and, in order thereabove, a radiation-cured layer cured by exposing a layer comprising a radiation curing compound to radiation, and a magnetic layer comprising a ferromagnetic powder dispersed in a binder, the radiation-cured layer comprising an inorganic powder that has been surface treated with a silane coupling agent.

Abstract: A magnetic recording medium is provided that has on a non-magnetic support, in order, a radiation-cured layer formed by curing a layer containing a radiation curing compound by exposure to radiation, a lower layer having a non-magnetic powder and/or a magnetic powder dispersed in a binder, and at least one magnetic layer having a ferromagnetic powder dispersed in a binder. The binder of at least the magnetic layer is a binder having a glass transition temperature of 100° C. to 200° C., and the magnetic layer has on its surface a number of micro projections having a height of 10 to 20 nm measured by atomic force microscopy (AFM) of 5 to 1,000/100 ?m2.

Abstract: A magnetic recording medium comprising a support having provided thereon a magnetic layer, wherein a smooth coating layer having a thickness of from 0.10 to 1 ?m, surface roughness of 5 nm or less, and 20 or less per 900 ?m2 of the protrusions having a height of 20 nm or more measured by an interatomic force microscope (AFM) is provided on the surface of at least one side of the support. And a method for producing a magnetic recording medium comprising a support having provided thereon a magnetic layer, which comprises providing a smooth coating layer having a thickness of from 0.10 to 1 ?m, surface roughness of 5 nm or less, and 20 or less per 900 ?m2 of the protrusions having a height of 20 nm or more measured by an interatomic force microscope (AFM) on the surface of at least one side of the support, and forming at least the magnetic layer on the smooth coating layer without performing rolling-up operation.

Abstract: A magnetic recording medium is provided that can ensure stable recording and reproducing characteristics with little off-track even when a track density in the direction of width of the tape is very high and 50 lines/mm or more, an off-track margin is 5 ?m or smaller, and a variation that is permitted at maximum as a dimensional variation in the direction of width of the tape itself due to environmental factors such as the change of temperature and humidity, the change of tension, a creep, etc. is small as low as 0.10% or less. Assuming that Young's modulus in the direction of width of a non-magnetic substrate is X and Young's modulus in the direction of width of the back layer is Y, X is 850 kg/mm2 or more, or when X is less than 850 kg/mm2, X×Y is 6×105 or more, and assuming that Young's modulus in the direction of width of a layer including a magnetic layer is Z, Y/Z is not larger than 6.0.

Abstract: A magnetic recording medium is provided that comprises a non-magnetic support and, in order thereabove, a radiation-cured layer (H) cured by exposing a layer comprising a conductive polymer (E) and a radiation curing monomer (C) to radiation, and a magnetic layer comprising a ferromagnetic powder dispersed in a binder.

Abstract: A magnetic recording medium is provided that comprises a non-magnetic support and, in order thereabove, a radiation-cured layer cured by exposing a layer comprising a radiation curing compound and a chain transfer agent to radiation, and a magnetic layer comprising a ferromagnetic powder dispersed in a binder.

Abstract: A magnetic recording medium is provided that includes a non-magnetic support and, in order, above the non-magnetic support, a radiation-cured material layer cured by exposing a layer that includes a radiation curable compound to radiation, and a magnetic layer that includes a fine ferromagnetic powder and a binder, a compound having one or more ether groups and three or more radiation curable functional groups per molecule being employed as the radiation curable compound, and the number of magnetic layer surface micro projections having a height measured by atomic force microscopy (AFM) of 10 to 20 nm being 5 to 1,000 per 100 (?m)2. There is also provided the magnetic recording medium wherein it further includes a non-magnetic layer that includes a non-magnetic powder and a binder.

Abstract: A magnetic tape having a lower non-magnetic layer containing non-magnetic powder and a binder, and an upper magnetic layer containing ferromagnetic powder and a binder, formed on a surface of a tape-form non-magnetic support. This magnetic tape has an intermediate binder layer, which is under the upper magnetic layer and has an average dry thickness of 10 to less than 50 nm. The average dry thickness of the upper magnetic layer is 5 to 100 nm, and the squareness ratio of the upper magnetic layer in the lengthwise direction is 0.8 or more. In this magnetic tape, the thickness of the magnetic layer and the fluctuation at the interface between the magnetic layer and the intermediate binder layer under the magnetic layer can be controlled. As a result, the PW50 value of a solitary waveform and modulation noise can be reduced. Thus, the magnetic tape shows excellent C/N characteristics.

Abstract: A surface processing method for processing the surface of an insulating article in which an ion-implanted surface-modified layer is effectively formed on the article 2. In surface processing the article 2 of an insulating material, an electrically conductive thin metal film 50 is first formed on the article surface. A pulsed voltage containing a positive pulsed voltage and a negative pulsed voltage is applied to the article in a plasma containing ions to be implanted to implant ions in the article surface. This implants ions at right angles to the article surface to generate a surface-modified layer 51. There is no possibility of the article 2 being charged up due to application of a pulsed voltage.

Abstract: A magnetic recording medium comprising: a nonmagnetic support; an undercoat layer containing a compound polymerizable by radiation exposure; and a magnetic layer containing ferromagnetic powder and a binder, in this order wherein the undercoat layer has a thickness of from 0.1 to 1 ?m, the binder contains a polyurethane resin having a glass transition temperature of from 100 to 200° C., the magnetic layer has a thickness of from 20 to 150 nm, and an average particle size of the ferromagnetic powder is from 20 to 60 nm.

Abstract: A magnetic recording medium is provided which includes, in order on a non-magnetic support, a radiation-cured layer formed by curing a layer containing a radiation curing compound by exposure to radiation, a middle layer having a non-magnetic powder dispersed in a binder (1), the middle layer being provided as necessary, and at least one magnetic layer having a ferromagnetic fine powder dispersed in a binder (2). The radiation curing compound has a hydroxyl group and a radiation curing functional group in the molecule, and the number of micro projections on the surface of the magnetic layer having a height of 10 to 20 nm measured by atomic force microscopy (AFM) is 5 to 1,000/100 (?m)2.

Abstract: The present invention provides a polyester film particularly useful as a base film for a magnetic recording medium such as cassette-type magnetic tape of a digital recording mode and a production process thereof. The polyester film is produced by irradiating UV light onto a surface of a film in a non-stretched stage or a stage prior to the completion of stretching to form fine protrusions on the surface. The fine protrusions on the film surface are specified by the ratio of 10-point average roughness Rz to center line average roughness Ra (Rz/Ra) on the surface (less than 20), the difference in concentration of carboxyl groups between the surface layer part and the inside of the film, and the number of fine protrusions.

Abstract: A magnetic recording medium comprising, in this order, a nonmagnetic support, a lower layer containing nonmagnetic powder and a binder, and a magnetic layer containing ferromagnetic powder and a binder, wherein N/Fe of the magnetic layer measured with a fluorescent X-ray apparatus is from 0.5 to 1.9 wt %, and a number of concavities having a depth of 5 to 10 nm on a surface of the magnetic layer is from 20 to 100/100 ?m2.