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公开(公告)号：US20110223446A1
公开(公告)日：2011-09-15
申请号：US13062640
申请日：2009-09-16
申请人： Takahiro Onoue , Teiichiro Umezawa
发明人： Takahiro Onoue , Teiichiro Umezawa
IPC分类号： G11B5/716
摘要： An object of the present invention is to provide a perpendicular magnetic recording medium the SNR of which is further improved while a high coercive force Hc is secured so that a higher recoding density can be achieved.The structure of a perpendicular magnetic recording medium 100 according to the present invention includes, on a base, at least a first magnetic recording layer 122a having a granular structure in which a non-magnetic grain boundary portion is formed between crystal particles grown in a columnar shape; a non-magnetic split layer 122b containing Ru disposed on the first magnetic layer; and a second magnetic recording layer 122c that is disposed on the split layer and that has a granular structure in which a non-magnetic grain boundary portion is formed between crystal particles grown in a columnar shape, wherein the first magnetic layer and the second magnetic layer contain oxides that form the grain boundary, and when an oxide content of the first magnetic layer is represented by A and an oxide content of the second magnetic layer is represented by B, a relationship between the oxide contents A/B is in the range of 0.5
摘要翻译： 本发明的目的是提供一种在保证高矫顽力Hc的同时进一步提高SNR的垂直磁记录介质，从而可以实现更高的记录密度。 根据本发明的垂直磁记录介质100的结构在基底上包括至少第一磁记录层122a，该第一磁记录层122a具有颗粒结构，其中在柱状生长的结晶颗粒之间形成非磁性晶界部分 形状; 包含设置在第一磁性层上的Ru的非磁性分离层122b; 以及第二磁记录层122c，其设置在分割层上，并且具有其中在柱状生长的晶体颗粒之间形成非磁性晶界部分的颗粒结构，其中第一磁性层和第二磁性层 含有形成晶界的氧化物，当第一磁性层的氧化物含量由A表示，第二磁性层的氧化物含量由B表示时，氧化物含量A / B的关系在 0.5
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公开(公告)号：US20110097604A1
公开(公告)日：2011-04-28
申请号：US12935813
申请日：2009-03-30
申请人： Takahiro Onoue
发明人： Takahiro Onoue
摘要： An object of the present invention is to provide a perpendicular magnetic recording medium capable of reducing noise in an electromagnetic transducing characteristic in a configuration including a magnetic recording layer of a granular structure containing Co and an auxiliary recording layer. The perpendicular magnetic recording medium of the present invention includes: on a non-magnetic substrate, a first magnetic recording layer 20a of a granular structure in which a non-magnetic grain boundary part is provided between magnetic grains in a columnar shape containing at least Co; a non-magnetic layer 22 provided on the first magnetic recording layer 20a; a second magnetic recording layer 20b of a granular structure in which a non-magnetic grain boundary part is provided between magnetic grains in a columnar shape containing Co provided on the non-magnetic layer 22; and an auxiliary recording layer 24 provided on the second magnetic recording layer 20b.
摘要翻译： 本发明的目的是提供一种垂直磁记录介质，其能够降低包括含有Co和辅助记录层的粒状结构的磁记录层的结构中的电磁感应特性中的噪声。 本发明的垂直磁记录介质包括：在非磁性基板上的第一磁性记录层20a，其中非磁性晶界部分设置在至少包含Co的柱状的磁性颗粒之间 ; 设置在第一磁记录层20a上的非磁性层22; 颗粒结构的第二磁记录层20b，其中非磁性晶界部分设置在包含设置在非磁性层22上的Co的圆柱形状的磁性颗粒之间; 以及设置在第二磁记录层20b上的辅助记录层24。
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公开(公告)号：US20100247965A1
公开(公告)日：2010-09-30
申请号：US12751329
申请日：2010-03-31
申请人： Takahiro Onoue
发明人： Takahiro Onoue
IPC分类号： G11B5/33
CPC分类号： G11B5/667 , G11B5/66 , G11B5/7325 , G11B5/82
摘要： In a perpendicular magnetic recording medium having, over a substrate, a magnetic recording layer, an underlayer made of Ru or a Ru compound and provided below the magnetic recording layer, a pre-underlayer made of a nonmagnetic crystalline material, and a soft magnetic layer provided below the pre-underlayer, when the difference between the highest point and the lowest point of unevenness of the interface between the soft magnetic layer and the pre-underlayer, derived by a cross-sectional TEM image, is given as an interface roughness (nm) and the distance between the soft magnetic layer and the magnetic recording layer, excluding the soft magnetic layer and the magnetic recording layer, is given as a SUL-MAG distance (nm), interface roughness (nm)≦0.4 (nm) and interface roughness×SUL-MAG distance (nm)≦12 (nm) are satisfied.
摘要翻译： 在具有磁记录层，由Ru或Ru化合物制成并设置在磁记录层下方的基底上的垂直磁记录介质，由非磁性晶体材料制成的预底层和软磁层 设置在预底层下方，当通过横截面TEM图像导出的软磁性层和预底层之间的界面的最高点和最低点之间的差异作为界面粗糙度（ nm），软磁层和磁记录层之间的磁记录层之间的距离（SUL-MAG距离（nm），界面粗糙度（nm）＆nlE; 0.4（nm） 和界面粗糙度×SUL-MAG距离（nm）＆nlE; 12（nm）。
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公开(公告)号：US20100039724A1
公开(公告)日：2010-02-18
申请号：US12443372
申请日：2007-09-26
申请人： Takahiro Onoue , Akira Shimada
发明人： Takahiro Onoue , Akira Shimada
摘要： In order to provide a magnetic recording medium having excellent electromagnetic conversion characteristics, a magnetic recording medium (10) is provided with a substrate (12), and a magnetic recording layer (20) formed on the substrate (12). The magnetic recording layer (20) is provided with a granular layer (32), i.e., a magnetic layer, including magnetic grains and a nonmagnetic material surrounding the magnetic grains in a section parallel to the main surface of the substrate. The ratio of the long diameter to the short diameter of each magnetic grain contained in the granular layer (32) is calculated in the section. In the histogram of such ratio, a half width at half maximum of the histogram is 0.6 or less and the variance of grain diameters of the magnetic grains in the section is 20% or less of the average grain diameter of the magnetic grains.
摘要翻译： 为了提供具有优异的电磁转换特性的磁记录介质，磁记录介质（10）设置有基板（12）和形成在基板（12）上的磁记录层（20）。 磁记录层（20）在平行于基板的主表面的部分中设置有包括磁性颗粒的磁性层（32），包括磁性颗粒的非磁性材料的磁性层（32）。 在该部分中计算包含在颗粒层（32）中的每个磁性颗粒的长径与短径的比率。 在该比率的直方图中，直方图的半值半宽度为0.6以下，截面中的磁性粒子的粒径的变化为磁性粒子的平均粒径的20％以下。
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25.发明授权公开(公告)号：US08871368B2
公开(公告)日：2014-10-28
申请号：US13119057
申请日：2009-09-16
IPC分类号： G11B5/66
CPC分类号： G11B5/65 , G11B5/66 , G11B5/72 , G11B5/8408
摘要： A perpendicular magnetic recording medium with SNR improved by reducing noise due to an auxiliary recording layer so that a higher recording density can be achieved. The perpendicular magnetic recording medium 100 includes a base, at least a magnetic recording layer 122 having a granular structure in which a non-magnetic grain boundary portion is formed between crystal particles grown in a columnar shape; a non-magnetic split layer 124 disposed on the magnetic recording layer 122 and containing Ru and oxygen; and an auxiliary recording layer 126 that is disposed on the split layer 124 and that is magnetically approximately continuous in an in-plane direction of a main surface of the base 110.
摘要翻译： 通过减少由于辅助记录层引起的噪声而提高SNR的垂直磁记录介质，从而可以实现更高的记录密度。 垂直磁记录介质100包括至少一个具有颗粒结构的磁记录层122，其中在以柱状形成的晶体颗粒之间形成非磁性晶界部分; 设置在磁记录层122上并含有Ru和氧的非磁性分离层124; 以及辅助记录层126，其设置在分离层124上，并且在基底110的主表面的面内方向上磁性近似连续。
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公开(公告)号：US08592061B2
公开(公告)日：2013-11-26
申请号：US12443372
申请日：2007-09-26
申请人： Takahiro Onoue , Akira Shimada
发明人： Takahiro Onoue , Akira Shimada
IPC分类号： G11B5/65
摘要： In order to provide a magnetic recording medium having excellent electromagnetic conversion characteristics, a magnetic recording medium (10) is provided with a substrate (12), and a magnetic recording layer (20) formed on the substrate (12). The magnetic recording layer (20) is provided with a granular layer (32), i.e., a magnetic layer, including magnetic grains and a nonmagnetic material surrounding the magnetic grains in a section parallel to the main surface of the substrate. The ratio of the long diameter to the short diameter of each magnetic grain contained in the granular layer (32) is calculated in the section. In the histogram of such ratio, a half width at half maximum of the histogram is 0.6 or less and the variance of grain diameters of the magnetic grains in the section is 20% or less of the average grain diameter of the magnetic grains.
摘要翻译： 为了提供具有优异的电磁转换特性的磁记录介质，磁记录介质（10）设置有基板（12）和形成在基板（12）上的磁记录层（20）。 磁记录层（20）在平行于基板的主表面的部分中设置有包括磁性颗粒的磁性层（32），包括磁性颗粒的非磁性材料的磁性层（32）。 在该部分中计算包含在颗粒层（32）中的每个磁性颗粒的长径与短径的比率。 在该比率的直方图中，直方图的半值半宽度为0.6以下，截面中的磁性粒子的粒径的变化为磁性粒子的平均粒径的20％以下。
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27.发明授权公开(公告)号：US08580410B2
公开(公告)日：2013-11-12
申请号：US12934935
申请日：2009-03-26
申请人： Takahiro Onoue
发明人： Takahiro Onoue
IPC分类号： G11B5/66
摘要： An object of the present invention is to provide a perpendicular magnetic recording medium 100 including a magnetic recording layer 122, the medium in which a particle diameter of crystal grains in the magnetic recording layer 122 of a two-layer structure is so designed as to improve an SNR while a high coercive force is maintained. In a method of manufacturing the perpendicular magnetic recording medium 100 according to the present invention, the perpendicular magnetic recording medium 100 includes at least a ground layer 118, a first magnetic recording layer 122a, and a second magnetic recording layer 122b in this order on a disk base 110; the first magnetic recording layer 122a and the second magnetic recording layer 122b are ferromagnetic layers each having a granular structure in which a grain boundary part made of a non-magnetic substance is formed between crystal grains each grown in a columnar shape, and A
摘要翻译： 本发明的目的是提供一种垂直磁记录介质100，其包括磁记录层122，其中两层结构的磁记录层122中的晶粒的粒径被设计成改进的介质 在维持高矫顽力的情况下的SNR。 在制造根据本发明的垂直磁记录介质100的方法中，垂直磁记录介质100至少包括接地层118，第一磁记录层122a和第二磁记录层122b 磁盘基座110; 第一磁记录层122a和第二磁记录层122b是具有颗粒结构的铁磁性层，其中在以柱状形成的晶粒之间形成由非磁性物质形成的晶界部分，A
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28.发明申请公开(公告)号：US20110097603A1
公开(公告)日：2011-04-28
申请号：US12934953
申请日：2009-03-26
申请人： Takahiro Onoue
发明人： Takahiro Onoue
摘要： An object of the present invention is to provide a perpendicular magnetic recording medium in which each space between crystal grains of a first magnetic recording layer is so designed as to allow the layer to also have a function as a continuous layer, and a method of manufacturing a perpendicular magnetic recording medium. In a perpendicular magnetic recording medium 100 according to the present invention, a first magnetic recording layer 122a and a second magnetic recording layer 122b are ferromagnetic layers each having a granular structure in which a grain boundary part made of a non-magnetic substance is formed between crystal grains each grown in a column shape and, in the first magnetic recording layer 122a, an intergranular distance defined by an average of shortest distances between grain boundary parts each between a crystal grain and its adjacent crystal grain is equal to or shorter than 1 nm.
摘要翻译： 本发明的目的是提供一种垂直磁记录介质，其中第一磁记录层的晶粒之间的每个空间被设计成允许该层还具有作为连续层的功能的制造方法 垂直磁记录介质。 在根据本发明的垂直磁记录介质100中，第一磁记录层122a和第二磁记录层122b是具有颗粒结构的铁磁层，其中形成由非磁性物质形成的晶界部分 在第一磁记录层122a中，由晶粒和其相邻晶粒之间的晶界部分之间的平均最短距离所限定的晶间距离等于或小于1nm， 。
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公开(公告)号：US20100323220A1
公开(公告)日：2010-12-23
申请号：US12666255
申请日：2008-10-06
申请人： Takahiro Onoue
发明人： Takahiro Onoue
IPC分类号： G11B5/33
摘要： A perpendicular magnetic recording medium includes a magnetic recording layer 22 having a granular structure composed of crystal grains containing cobalt (Co) and grown in a columnar shape and a grain boundary portion comprising a nonmagnetic substance and formed between the crystal grains, and a continuous layer 24 of a thin film magnetically continuous in a film plane direction. The continuous layer 24 includes a plurality of layers 24a and 24b containing cobalt, chromium (Cr), and platinum (Pt). Among the layers, the layer 24a nearer to the magnetic recording layer has a greater chromium content.
摘要翻译： 垂直磁记录介质包括磁记录层22，该磁记录层22具有由包含钴（Co）的晶粒构成并以柱状形成的颗粒结构和包含非磁性物质并形成在晶粒之间的晶界部分的颗粒结构，以及连续层 24的薄膜在膜平面方向上磁连续。 连续层24包括含有钴，铬（Cr）和铂（Pt）的多个层24a和24b。 在这些层中，靠近磁记录层的层24a具有更大的铬含量。
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