公开(公告)号：US07566507B2

公开(公告)日：2009-07-28

申请号：US11221270

申请日：2005-09-07

Applicant: E. Noel Abarra ,  Akihiro Inomata ,  Antony Ajan

Inventor： E. Noel Abarra ,  Akihiro Inomata ,  Antony Ajan

IPC: G11B5/66

CPC classification number: G11B5/732 ,  G11B5/656 ,  G11B5/66 ,  G11B5/7325 ,  G11B5/84 ,  G11B5/851

Abstract: A magnetic recording medium is provided with an hcp Co alloy magnetic layer with the crystallographic c-axes tilted at an angle from a substrate surface and fixed relative to a recording direction. The tilt is induced by epitaxial growth of the hcp Co alloy on an obliquely evaporated nonmagnetic polycrystalline underlayer, so that the magnetic recording medium exhibits thermal stability and improved overwrite with a single pole-type head.

Abstract translation: 磁记录介质设置有hcp Co合金磁性层，其结晶c轴相对于衬底表面倾斜一定角度并相对于记录方向固定。 通过在倾斜蒸发的非磁性多晶底层上外延生长hcp Co合金来诱导倾斜，使得磁记录介质表现出热稳定性并且用单极型头改进了改写。

公开(公告)号：US06613460B1

公开(公告)日：2003-09-02

申请号：US09584603

申请日：2000-05-31

Applicant: E. Noel Abarra ,  Iwao Okamoto

Inventor： E. Noel Abarra ,  Iwao Okamoto

IPC: G11B566

CPC classification number: G11B5/7325 ,  G11B5/66 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/12743 ,  Y10T428/1275 ,  Y10T428/265

Abstract: A magnetic recording medium is constructed to include a substrate, a magnetic layer made of a Co or Co-based alloy, and an underlayer disposed between the substrate and the magnetic layer. The underlayer is made of an ordered intermetallic material of FCC L12 or FCT L10 crystalline structure.

Abstract translation: 磁记录介质被构造成包括基底，由Co或Co基合金制成的磁性层以及设置在基底和磁性层之间的底层。 底层由FCC L12或FCT L10晶体结构的有序金属间材料制成。

公开(公告)号：US07264892B2

公开(公告)日：2007-09-04

申请号：US10936005

申请日：2004-09-08

Applicant: Antony Ajan ,  Akihiro Inomata ,  E. Noel Abarra ,  B. Ramamurthy Acharya

Inventor： Antony Ajan ,  Akihiro Inomata ,  E. Noel Abarra ,  B. Ramamurthy Acharya

IPC: G11B5/66

CPC classification number: G11B5/732 ,  G11B5/012 ,  G11B5/656 ,  G11B5/66 ,  G11B5/7325 ,  Y10T428/265

Abstract: A magnetic recording medium includes a substrate, a magnetic recording layer made of a Co alloy or a CoCr alloy, a seed layer disposed between the substrate and the magnetic recording layer, and an underlayer made of a binary alloy material having a B2 structure and disposed between the seed layer and the magnetic recording layer. The seed layer is made of a material comprising essentially of one of elements forming the binary alloy material of the underlayer.

Abstract translation: 磁记录介质包括基板，由Co合金或CoCr合金制成的磁记录层，设置在基板和磁记录层之间的种子层，以及由具有B2结构的二元合金材料制成的底层 在种子层和磁记录层之间。 种子层由基本上由形成底层的二元合金材料的元素之一组成的材料制成。

公开(公告)号：US06689495B1

公开(公告)日：2004-02-10

申请号：US09588451

申请日：2000-06-06

Applicant: Hisateru Sato ,  Isatake Kaitsu ,  E. Noel Abarra ,  Iwao Okamoto ,  Yoshifumi Mizoshita

Inventor： Hisateru Sato ,  Isatake Kaitsu ,  E. Noel Abarra ,  Iwao Okamoto ,  Yoshifumi Mizoshita

IPC: G11B566

CPC classification number: G11B5/74 ,  G11B5/66 ,  G11B5/82 ,  G11B2005/0002 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/12861 ,  Y10T428/265

Abstract: A magnetic recording medium is constructed to include at least one exchange layer structure and a magnetic layer provided on the exchange layer structure. The exchange layer structure includes a ferromagnetic layer and a non-magnetic coupling layer provided on the ferromagnetic layer. At least one of the ferromagnetic layer and the magnetic layer has a granular layer structure in which ferromagnetic crystal grains are uniformly distributed within a non-magnetic base material.

Abstract translation: 磁记录介质被构造成包括至少一个交换层结构和设置在交换层结构上的磁性层。 交换层结构包括铁磁层和设置在铁磁层上的非磁性耦合层。 铁磁层和磁性层中的至少一个具有其中铁磁性晶粒均匀分布在非磁性基材内的颗粒层结构。

公开(公告)号：US07354665B2

公开(公告)日：2008-04-08

申请号：US11063937

申请日：2005-02-23

Applicant: Antony Ajan ,  E. Noel Abarra

Inventor： Antony Ajan ,  E. Noel Abarra

IPC: G11B5/66

CPC classification number: G11B5/732 ,  G11B5/656 ,  G11B5/66

Abstract: A magnetic recording medium is provided with a substrate, a recording magnetic layer made of a CoCr alloy and having a (11 20) crystallographic texture, and an underlayer, made of an AlV or AlRuV alloy, disposed between the substrate and the magnetic layer.

Abstract translation: 磁记录介质设置有基板，由CoCr合金制成并具有（11

公开(公告)号：US20070217074A1

公开(公告)日：2007-09-20

申请号：US11686865

申请日：2007-03-15

Applicant: Jianing Zhou ,  B. Ramamurthy Acharya ,  E. Noel Abarra ,  Gunn Choe

Inventor： Jianing Zhou ,  B. Ramamurthy Acharya ,  E. Noel Abarra ,  Gunn Choe

IPC: G11B5/82

CPC classification number: G11B5/82 ,  G11B5/667

Abstract: A perpendicular recording medium having a perpendicular magnetic recording layer and a magnetically soft underlayer structure disposed beneath the recording layer. The soft underlayer structure includes at least first and second soft magnetic layers having different magnetic permeabilities to create a magnetic permeability gradient in the soft underlayer structure. One or more of the soft magnetic layers can be anti-parallel coupled. The soft underlayer structure of the present invention having a magnetic permeability gradient advantageously leads to reduced adjacent track erasure (ATE) while maintaining good overwrite (OW) properties.

Abstract translation: 一种垂直记录介质，其具有设置在记录层下方的垂直磁记录层和磁软底层结构。 软底层结构包括至少具有不同磁导率的第一和第二软磁层，以在软底层结构中产生磁导率梯度。 一个或多个软磁性层可以是反平行耦合的。 具有磁导率梯度的本发明的软底层结构有利地导致减少的相邻轨迹擦除（ATE），同时保持良好的重写（OW）特性。

公开(公告)号：US06821652B1

公开(公告)日：2004-11-23

申请号：US09588923

申请日：2000-06-06

Applicant: Iwao Okamoto ,  E. Noel Abarra ,  Yoshifumi Mizoshita

Inventor： Iwao Okamoto ,  E. Noel Abarra ,  Yoshifumi Mizoshita

IPC: G11B566

CPC classification number: G11B5/66 ,  G11B5/74 ,  G11B5/82 ,  G11B2005/0002 ,  Y10S428/90 ,  Y10T428/265

Abstract: A magnetic recording medium is constructed to include at least one exchange layer structure, and a magnetic layer formed on the exchange layer structure, where the exchange layer structure comprises a ferromagnetic layer, and a non-magnetic coupling layer provided on the ferromagnetic layer and under the magnetic layer. The ferromagnetic layer and the magnetic layer have antiparallel magnetizations. The non-magnetic coupling layer is made of a Ru-M3 alloy, where M3 is an added element or alloy, and a lattice mismatch between the non-magnetic coupling layer and the magnetic layer and the ferromagnetic layer respectively disposed above and below the non-magnetic coupling layer is adjusted to approximately 6% or less by addition of M3.

Abstract translation: 磁记录介质被构造为包括至少一个交换层结构，以及形成在交换层结构上的磁性层，其中交换层结构包括铁磁层，以及设置在铁磁层上和下面的非磁性耦合层 磁性层。 铁磁层和磁性层具有反平行磁化。 非磁性耦合层由Ru-M3合金制成，其中M3是添加元素或合金，非磁性耦合层与分别设置在非磁性耦合层之上和之下的磁性层和铁磁层之间的晶格失配 通过添加M3将磁耦合层调节至约6％以下。

公开(公告)号：US06773833B2

公开(公告)日：2004-08-10

申请号：US09809527

申请日：2001-03-15

Applicant: Akihiro Inomata ,  E. Noel Abarra ,  B. Ramamurthy Acharya

Inventor： Akihiro Inomata ,  E. Noel Abarra ,  B. Ramamurthy Acharya

IPC: G11B566

CPC classification number: B82Y25/00 ,  G11B5/012 ,  G11B5/66 ,  G11B2005/0002 ,  G11B2005/0005 ,  G11C11/16 ,  H01F10/3272 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/12854 ,  Y10T428/24942 ,  Y10T428/2495 ,  Y10T428/265

Abstract: A magnetic storage medium includes first and second magnetic layers provided on a support substrate such that the first and second magnetic layers have respective first and second magnetizations in an anti-parallel relationship in a state no substantial writing magnetic field is applied. The first and second magnetizations are changed to a parallel relationship when a writing magnetic field is applied to the magnetic storage medium, and the first and second magnetizations are changed to the anti-parallel relationship as a result of a magnetic reversal caused in the second magnetic layer with diminishing of the writing magnetic field. The reversal is caused as a result of the action of a reversing magnetic field that dominates before the writing magnetic field is diminished and becomes zero.

Abstract translation: 磁存储介质包括设置在支撑基板上的第一和第二磁性层，使得第一和第二磁性层在不施加实质写入磁场的状态下具有反并联关系的相应的第一和第二磁化。 当写入磁场施加到磁存储介质时，第一和第二磁化被改变为平行关系，并且由于在第二磁场中引起的磁反转的结果，第一和第二磁化被改变为反并联关系 写入磁场减小的层。 由于在写入磁场减小并成为零之前主导的反转磁场的作用导致反转。

公开(公告)号：US20130022842A1

公开(公告)日：2013-01-24

申请号：US13620324

申请日：2012-09-14

Applicant: Jianing Zhou ,  B. Ramamurthy Acharya ,  E. Noel Abarra ,  Gunn Choe

Inventor： Jianing Zhou ,  B. Ramamurthy Acharya ,  E. Noel Abarra ,  Gunn Choe

IPC: G11B5/667

CPC classification number: G11B5/82 ,  G11B5/667

Abstract: A perpendicular recording medium having a perpendicular magnetic recording layer and a magnetically soft underlayer structure disposed beneath the recording layer. The soft underlayer structure includes at least first and second soft magnetic layers having different magnetic permeabilities to create a magnetic permeability gradient in the soft underlayer structure. One or more of the soft magnetic layers can be antiparallel coupled. The soft underlayer structure of the present invention having a magnetic permeability gradient advantageously leads to reduced adjacent track erasure (ATE) while maintaining good overwrite (OW) properties.

Abstract translation: 一种垂直记录介质，其具有设置在记录层下方的垂直磁记录层和磁软底层结构。 软底层结构包括至少具有不同磁导率的第一和第二软磁层，以在软底层结构中产生磁导率梯度。 一个或多个软磁层可以是反平行耦合的。 具有磁导率梯度的本发明的软底层结构有利地导致减少的相邻轨迹擦除（ATE），同时保持良好的重写（OW）特性。

公开(公告)号：US08277962B2

公开(公告)日：2012-10-02

申请号：US12879849

申请日：2010-09-10

Applicant: Jianing Zhou ,  B. Ramamurthy Acharya ,  E. Noel Abarra ,  Gunn Choe

Inventor： Jianing Zhou ,  B. Ramamurthy Acharya ,  E. Noel Abarra ,  Gunn Choe

IPC: G11B5/82

CPC classification number: G11B5/82 ,  G11B5/667

Abstract: A perpendicular recording medium having a perpendicular magnetic recording layer and a magnetically soft underlayer structure disposed beneath the recording layer. The soft underlayer structure includes at least first and second soft magnetic layers having different magnetic permeabilities to create a magnetic permeability gradient in the soft underlayer structure. One or more of the soft magnetic layers can be anti-parallel coupled. The soft underlayer structure of the present invention having a magnetic permeability gradient advantageously leads to reduced adjacent track erasure (ATE) while maintaining good overwrite (OW) properties.

Abstract translation: 一种垂直记录介质，其具有设置在记录层下方的垂直磁记录层和磁软底层结构。 软底层结构包括至少具有不同磁导率的第一和第二软磁层，以在软底层结构中产生磁导率梯度。 一个或多个软磁性层可以是反平行耦合的。 具有磁导率梯度的本发明的软底层结构有利地导致减少的相邻轨迹擦除（ATE），同时保持良好的重写（OW）特性。