公开(公告)号：US06623875B2

公开(公告)日：2003-09-23

申请号：US09901380

申请日：2001-07-09

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

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

IPC: G11B566

CPC classification number: G11B5/656 ,  G11B5/66 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/12854 ,  Y10T428/24942 ,  Y10T428/265

Abstract: A magnetic recording medium includes at least one magnetic layer, a ferromagnetic layer, a nonmagnetic coupling layer provided between the magnetic layer and the ferromagnetic layer, and a coupling intensifying region which intensifies an exchange coupling strength between the magnetic layer and the ferromagnetic layer. The coupling intensifying region is provided at, at least one of a boundary between the ferromagnetic layer and the nonmagnetic coupling layer and a boundary between the nonmagnetic coupling layer and the magnetic layer.

公开(公告)号：US06610424B1

公开(公告)日：2003-08-26

申请号：US09721097

申请日：2000-11-22

Applicant: B. Ramamurthy Acharya ,  E. Noel Abarra

Inventor： B. Ramamurthy Acharya ,  E. Noel Abarra

IPC: G11B566

CPC classification number: G11B5/66 ,  G11B5/00 ,  G11B5/64 ,  Y10S428/90 ,  Y10T428/24942 ,  Y10T428/265

Abstract: A magnetic recording medium provided with a substrate and a magnetic layer disposed above the substrate, is characterized by the magnetic layer which includes an initial layer located closer to the substrate and a final layer located further away from the substrate than the initial layer. A saturation magnetization MSa of the initial layer, a saturation magnetization MSb of the final layer, and a saturation magnetization MStot of the magnetic layer as a whole satisfies a relationship MSa MStot>MSb.

Abstract translation: 设置有衬底和设置在衬底上方的磁性层的磁记录介质的特征在于磁性层，其包括位于更靠近衬底的初始层和位于比初始层更远离衬底的最终层。 初始层的饱和磁化强度MSa，最终层的饱和磁化强度MSb以及整个磁性层的饱和磁化强度MStot满足关系MSa MSa> MStot> MSb。

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：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：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：US07588842B1

公开(公告)日：2009-09-15

申请号：US11218771

申请日：2005-09-02

Applicant: E. Noel Abarra ,  Min Zheng ,  Paramjit Gill

Inventor： E. Noel Abarra ,  Min Zheng ,  Paramjit Gill

IPC: G11B5/66

CPC classification number: G11B5/66 ,  G11B5/667 ,  G11B5/7325

Abstract: A magnetic recording medium and a magnetic recording apparatus for perpendicular magnetic recording. The recording medium includes a magnetically soft underlayer and a hard magnetic pinning layer having perpendicular anisotropy. The magnetically soft underlayer is substantially free of domain walls.

Abstract translation: 一种用于垂直磁记录的磁记录介质和磁记录装置。 记录介质包括磁软底层和具有垂直各向异性的硬磁性钉扎层。 磁软底层基本上没有畴壁。

公开(公告)号：US06828047B2

公开(公告)日：2004-12-07

申请号：US10400891

申请日：2003-03-27

Applicant: E. Noel Abarra ,  Iwao Okamoto

Inventor： E. Noel Abarra ,  Iwao Okamoto

IPC: G11B566

CPC classification number: G11B5/732 ,  G11B5/1278 ,  G11B5/66 ,  G11B5/7325 ,  G11B5/82 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/12854

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, so that c-axis of the magnetic layer is aligned in a predetermined direction.

Abstract translation: 磁记录介质被构造为包括基底，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化合物制成，使得磁性层的c轴沿预定方向排列。

公开(公告)号：US06602612B2

公开(公告)日：2003-08-05

申请号：US09938032

申请日：2001-08-23

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

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

IPC: G11B566

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

Abstract: A magnetic recording medium is provided with at least one exchange layer structure, and a magnetic layer formed on the exchange layer structure. The exchange layer structure includes 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.