Abstract: The purpose of the present invention is to provide a perpendicular magnetic recording medium which uses an Ru seed layer having a (002)-oriented hcp structure, and has a magnetic recording layer including a (001)-oriented L10 ordered alloy suitable to perpendicular magnetic recording. The magnetic recording medium of the present invention includes a substrate, a first seed layer containing Ru, a second seed layer containing ZnO, a third seed layer containing MgO, and a magnetic recording layer containing an ordered alloy, in this order, the first seed layer having the (002)-oriented hexagonal closest packed structure.

Abstract: A perpendicular magnetic recording medium includes a non-magnetic substrate; and a magnetic recording layer that includes magnetic crystal grains and a non-magnetic crystal grain boundary that surrounds the magnetic crystal grains, wherein the magnetic crystal grains contain an ordered alloy and the non-magnetic crystal grain boundary contains Ge oxides. The magnetic recording layer may have a granular structure. The magnetic crystal grains may be micronized to be sufficiently ordered and separated, and the perpendicular magnetic recording medium may have a high magnetic anisotropy constant Ku and high coercivity Hc.

Abstract: The purpose of the present invention is to provide a magnetic recording medium having a stacked structure of a seed layer including (Mg1-xTix)O and a magnetic recording layer including an L10 ordered alloy, and having improved properties. The method for producing a magnetic recording layer according to the present invention includes the steps of: (1) preparing a substrate; (2) forming a seed layer including (Mg1-xTix)O onto the substrate; (3) plasma etching the seed layer in an atmosphere including inert gas; and (4) forming a magnetic recording layer including an ordered alloy onto the seed layer which has been subjected to the step (3).

Abstract: The magnetic recording medium includes at least a nonmagnetic substrate and a magnetic recording layer, the magnetic recording layer consists of a first magnetic recording layer or a plurality of layers including at least the first magnetic recording layer and a second magnetic recording layer, the first magnetic recording layer has a granular structure including a first magnetic crystal grain and a first nonmagnetic crystal grain boundary, the first magnetic crystal grain consists of an ordered alloy having Fe, Pt and Rh, the first nonmagnetic crystal grain boundary consists of carbon, boron or a combination thereof, the second magnetic recording layer has a granular structure including a second magnetic crystal grain and a second nonmagnetic crystal grain boundary, the second magnetic crystal grain consists of an FePt ordered alloy or an ordered alloy having Fe, Pt and Rh, and the second nonmagnetic crystal grain boundary includes carbon.

Abstract: The present invention aims at providing a magnetic recording medium that can lower a Curie temperature (Tc) of a magnetic material, without increasing an in-plane coercive force and lowering magnetic properties. The magnetic recording medium is a magnetic recording medium comprising a substrate and a magnetic recording layer, the magnetic recording layer comprising an FePtRh ordered alloy, wherein a Rh content in the FePtRh ordered alloy is 10 at % or less.

Abstract: The present invention is a method for mass-production of a recording medium with the component composition thereof monotonically changing along the film thickness direction. In the method, the magnetic recording medium that includes at least a substrate, and first magnetic recording layer and second magnetic recording layer as the magnetic recording layer. The method includes: laminating a second magnetic layer of FePtRh on a first magnetic layer of FePt or FePtRh with heating. In the method, heat treatment may be preheat-treatment or postheat-treatment, when laminating the second magnetic layer of FePtRh onto the first magnetic layer of FePtRh, the concentration of Rh in the second magnetic layer is higher than that of the first magnetic layer.

Abstract: The present invention aims at providing a magnetic recording medium capable of realizing lowering of recording temperature. A magnetic recording medium comprises a substrate, and a magnetic recording layer comprising a first magnetic layer and a second magnetic layer, in which the second magnetic layer comprises an FePtRh ordered alloy, and the first magnetic layer has Ku at room temperature larger than Ku of the second magnetic layer at room temperature.

Abstract: A method for manufacturing a semiconductor device includes: providing a support with a semiconductor light-emitting element including a first electrode and a second electrode; providing a base including a first interconnect terminal and a second interconnect terminal; forming a first metal layer on the support to cover the first and the second electrodes; forming a second metal layer on the base to cover the first and the second interconnect terminals; arranging the first and second electrodes and the first and second interconnect terminals to respectively face each other, and providing electrical connection therebetween by atomic diffusion; and rendering electrically insulative or removing portions of the first metal layer and the second metal layer that are outside thereof defined between the first and second electrodes and the first and second interconnect terminals.

Abstract: The purpose of the present invention is to provide a magnetic recording medium capable of reducing the surface roughness of the magnetic recording layer without adversely affecting the magnetic properties of the magnetic recording layer. The magnetic recording medium of the present invention includes a substrate, a seed layer on the substrate, and a magnetic recording layer on the seed layer, wherein the seed layer has a structure of: (a) a spinel structure consisting of Mg, Cr and O; (b) a spinel structure consisting of Zn, Fe and O; or (c) an inverse spinel structure consisting of Mg, Ti and O.

Abstract: The purpose of the present invention is to provide a magnetic recording medium capable of achieving high recording density by decreasing the bit transition width of a heat-assisted magnetic recording medium during the heat-assisted recording stage. The magnetic recording medium according to the present invention includes a non-magnetic substrate and a magnetic recording layer, wherein the magnetic recording layer includes an ordered alloy containing Fe, Pt and Ru, the ordered alloy includes x atom % of Fe, y atom % of Pt and z atom % of Ru on the basis of the total number of the Fe, Pt and Ru atoms, and the parameters x, y and z satisfy the following expressions (i)-(v): (i) 0.85?x/y?1.3; (ii) x?53; (iii) y?51; (iv) 0.6?z?20; and (v) x+y+z=100.

Abstract: The purpose of the present invention is to provide a magnetic recording medium making secondary growth of magnetic crystal grains inhibited, having a magnetic recording layer having a large film thickness, and exhibiting excellent magnetic characteristics, and to provide a method for producing the medium. A magnetic recording medium according to the present invention includes a substrate and a magnetic recording layer that includes a lower layer and an upper layer, in which the lower layer and the upper layer include magnetic crystal grains formed of an ordered alloy and non-magnetic grain boundaries, the lower layer is formed by depositing Bi, C and an element constituting the ordered alloy, and the upper layer is formed by depositing C and an element constituting the ordered alloy. The present invention also provides a method for producing the above-described magnetic recording medium.

Abstract: The present invention relates to a magnetic recording medium, and this magnetic recording medium includes at least a non-magnetic substrate and a magnetic recording layer. In the magnetic recording medium of the present invention, the magnetic recording layer includes an ordered alloy having an L10-ordered structure, includes Fe, Pt, and V, and has a composition of Pt>Fe.

Abstract: The problem of the invention is to provide a process for producing a magnetic recording medium which exhibits both of excellent thermal stability and favorable writing capability. The process for producing the magnetic recording medium of the invention includes the steps of: (A) forming the first magnetic recording layer while monotonously changing a substrate temperature; and (B) forming the second magnetic recording layer while monotonously changing the substrate temperature wherein the material of the second magnetic recording layer is different from the material of the first recording layer, wherein the substrate temperature at the beginning of the step (B) is set such that the magnetic anisotropy constant of the first magnetic recording layer and the magnetic anisotropy constant of the second magnetic recording layer is changed monotonously at the interface between the first and second magnetic recording layers.

Abstract: A perpendicular magnetic recording medium includes at least a nonmagnetic substrate and a magnetic recording layer. The magnetic recording layer is constituted by a plurality of layers that includes at least a first magnetic recording layer and a second magnetic recording layer. The first magnetic recording layer has a granular structure that includes first magnetic crystal grains and first nonmagnetic crystal grain boundaries surrounding the first magnetic crystal grains. The first magnetic crystal grains include an ordered alloy, and the first nonmagnetic crystal grain boundaries are constituted by carbon. The second magnetic recording layer has a granular structure that includes second magnetic crystal grains and a second nonmagnetic crystal grain boundaries that surround the second magnetic crystal grains. The second magnetic crystal grains include an ordered alloy, and the second nonmagnetic crystal grain boundaries are constituted by a carbon-containing nonmagnetic material.

Abstract: The purpose of the present invention is to provide a magnetic recording medium including a magnetic recording layer having more excellent magnetic properties and including an L10 type ordered alloy. One constitutional example of the magnetic recording medium includes a substrate, a first seed layer comprising ZnO, a second seed layer comprising MgO, and a magnetic recording layer comprising an ordered alloy, in this order.

Abstract: A method for manufacturing perpendicular magnetic recording medium which includes magnetic recording layer having desired film thickness while maintaining high magnetic anisotropy and having more homogenized magnetic characteristics. The method includes: (A) preparing non-magnetic substrate; (B) laminating magnetic recording layer on the substrate; and (C) heating the substrate on which the magnetic recording layer is laminated to a temperature of 400 to 600° C. The step (B) includes at least forming a first magnetic recording layer and a second magnetic layer thereon. The first layer has a granular structure including a first magnetic crystal grain constituted by an ordered alloy surrounded by a first non-magnetic grain boundary constituted by carbon, and the second layer has a granular structure including a second magnetic crystal grain constituted by an ordered alloy surrounded by a second non-magnetic grain boundary constituted by a non-magnetic material constituted by boron and carbon.

Abstract: The purpose of the invention is to provide a magnetic recording medium in which the surface roughness of the magnetic recording layer can be reduced without deterioration of the magnetic properties of the magnetic recording layer. The magnetic recording medium of the present invention includes a substrate, a seed layer on the substrate, and a magnetic recording layer on the seed layer, wherein the seed layer contains Mn, Cr, and O, and has a spinel structure.

Abstract: The problem of the invention is to provide a magnetic thin film having a high magnetic anisotropy constant Ku and a high coercive force Hc, and to provide an application device comprising the above magnetic thin film. The magnetic thin film of the present invention includes an ordered alloy including: at least one first element selected from the group consisting of Fe and Ni; at least one second element selected from the group consisting of Pt, Pd, Au and Ir; and Sc.

Abstract: The purpose of the present invention is to provide a method for manufacturing a magnetic recording medium including a magnetic recording layer having a larger magnetic anisotropic constant Ku. The method according to the present invention includes the steps of: (a) preparing a substrate; (b) heating the substrate to a temperature of 350° C. or higher, and depositing a non-magnetic material containing MgO as a main component to form a base layer; and (c) forming a magnetic recording layer onto the base layer.

Abstract: A magnetic recording medium including a magnetic recording layer of a granular structure and having a large thickness as well as excellent magnetic properties is provided. The perpendicular magnetic recording medium includes a non-magnetic substrate and a magnetic recording layer, wherein the magnetic recording layer includes first magnetic recording layers on the side of the non-magnetic substrate and second magnetic recording layers, the first magnetic layers have a granular structure including first magnetic crystal grains containing an ordered alloy and a first non-magnetic segregant surrounding the first magnetic crystal grains and containing carbon; and the second magnetic layers have a granular structure including second magnetic crystal grains containing an ordered alloy and a second non-magnetic segregant surrounding the second magnetic crystal grains and containing Zn and O.