-
1.发明授权Magnetic recording medium having three ferromagnetic layers with increasing intrinsic coercivity from the lower to the upper layer 失效具有三层铁磁层的磁记录介质，其具有从下层到上层增加的固有矫顽力公开(公告)号：US07180710B2
公开(公告)日：2007-02-20
申请号：US10853431
申请日：2004-05-24
申请人： Hoa Van Do , David Margulies , Hal J. Rosen , Natacha F. Supper
发明人： Hoa Van Do , David Margulies , Hal J. Rosen , Natacha F. Supper
IPC分类号： G11B5/66
摘要： A magnetic recording medium has a laminated magnetic structure with at least three magnetic layers, wherein the magnetic layers have decreasing intrinsic coercivity H0 with distance from the write head. The write field at the center of each magnetic layer is greater than that layer's H0. The magnetic layers have different compositions and/or thicknesses and thereby different values of H0. The alloys used in the middle and upper magnetic layers are relatively “high-moment” alloys that would not ordinarily be used in magnetic recording media because they have relatively low S0NR, but the overall S0NR of the laminated magnetic structure is improved because of the effect of lamination. The middle and upper magnetic layers can be made substantially thinner, which enables the magnetic layers to be located closer to the write head, thereby exposing each of the magnetic layers to a higher write field.
摘要翻译： 磁记录介质具有至少三个磁性层的层叠磁性结构，其中磁性层具有与写头距离更小的固有矫顽力H 0 0。 每个磁性层的中心处的写入场大于该层的H 0 0。 磁性层具有不同的组成和/或厚度，从而具有不同的H 0 O值。 在中上层磁性层中使用的合金是相对“高力矩”的合金，它们通常不会用于磁记录介质，因为它们具有相对较低的S O N，但总体上S 0得到改善。 可以使中上层磁性层和上磁性层实质上更薄，这使得磁层能够更靠近写入头位置，从而将每个磁性层暴露于较高的写入场。
-
2.发明授权Magnetic recording system with three-layer laminated media having improved signal-to-noise ratio 失效具有提高的信噪比的具有三层层压介质的磁记录系统公开(公告)号：US07177118B2
公开(公告)日：2007-02-13
申请号：US10853631
申请日：2004-05-24
申请人： Hoa Van Do , David Margulies , Hal J. Rosen , Natacha F. Supper
发明人： Hoa Van Do , David Margulies , Hal J. Rosen , Natacha F. Supper
CPC分类号： G11B5/66
摘要： A magnetic recording system uses a magnetic recording medium having a laminated magnetic structure with at least three magnetic layers, wherein the magnetic layers have decreasing intrinsic coercivity H0 with distance from the write head. The write field at the center of each magnetic layer is greater than that layer's H0. The magnetic layers have different compositions and/or thicknesses and thereby different values of H0. The alloys used in the middle and upper magnetic layers are relatively “high-moment” alloys that would not ordinarily be used in magnetic recording media because they have relatively low S0NR, but the overall S0NR of the laminated magnetic structure is improved because of the effect of lamination. The middle and upper magnetic layers can be made substantially thinner, which enables the magnetic layers to be located closer to the write head, thereby exposing each of the magnetic layers to a higher write field.
摘要翻译： 磁记录系统使用具有至少三个磁性层的层叠磁性结构的磁记录介质，其中磁层具有与写入头距离更小的固有矫顽力H 0 0。 每个磁性层的中心处的写入场大于该层的H 0 0。 磁性层具有不同的组成和/或厚度，从而具有不同的H 0 O值。 在中上层磁性层中使用的合金是相对“高力矩”的合金，它们通常不会用于磁记录介质，因为它们具有相对较低的S O N，但总体上S 0得到改善。 可以使中上层磁性层和上磁性层实质上更薄，这使得磁层能够更靠近写入头位置，从而将每个磁性层暴露于较高的写入场。
-
3.发明授权Antiferromagnetically coupled magnetic recording media with CoCrFe alloy first ferromagnetic film 有权具有CoCrFe合金第一铁磁膜的反铁磁耦合磁记录介质公开(公告)号：US06835476B2
公开(公告)日：2004-12-28
申请号：US10386834
申请日：2003-03-11
IPC分类号： G11B566
CPC分类号： G11B5/732 , G11B5/66 , G11B5/7325 , Y10S428/90 , Y10T428/12465 , Y10T428/24802 , Y10T428/24942
摘要： A magnetic recording medium for data storage uses a magnetic recording layer having at least two ferromagnetic films exchange coupled together antiferromagnetically across a nonferromagnetic spacer film. In this antiferromagnetically-coupled (AFC) recording layer the magnetic moments of the two ferromagnetic films are oriented antiparallel, and thus the net remanent magnetization-thickness product (Mrt) of the AFC recording layer is the difference in the Mrt values of the two ferromagnetic films. This reduction in Mrt is accomplished without a reduction in thermal stability of the recording medium. The lower ferromagnetic film in the AFC recording layer is a ferromagnetic CoCrFe alloy that does not require a nucleation layer between it and the Cr alloy underlayer. The medium with the CoCrFe alloy as the first or lower ferromagnetic film in the AFC recording layer has reduced intrinsic media noise.
摘要翻译： 用于数据存储的磁记录介质使用具有至少两个铁磁膜的磁记录层，它们通过非铁磁间隔膜反铁磁交换耦合在一起。 在这种反铁磁耦合（AFC）记录层中，两个铁磁性膜的磁矩反平行取向，因此，AFC记录层的净残余磁化厚度乘积（Mrt）是两个铁磁性膜的Mrt值之差 电影。 在不损失记录介质的热稳定性的情况下实现了Mrt的这种减少。 AFC记录层中的下铁磁膜是铁基CoCrFe合金，其不需要在其与Cr合金底层之间的成核层。 具有CoCrFe合金作为AFC记录层中的第一或更低铁磁性膜的介质降低了本征介质噪声。
-
4.发明授权公开(公告)号：US07582368B2
公开(公告)日：2009-09-01
申请号：US11532055
申请日：2006-09-14
IPC分类号： G11B5/66
摘要： A perpendicular magnetic recording system and medium has a multilayered recording layer that includes an exchange-spring structure and a ferromagnetic lateral coupling layer (LCL). The exchange-spring structure is made up of two ferromagnetically exchange-coupled magnetic layers (MAG1 and MAG2), each with perpendicular magnetic anisotropy. MAG1 and MAG2 are either in direct contact with one another or have a coupling layer (CL) located between them. The LCL is located in direct contact with MAG2 and mediates intergranular exchange coupling in MAG2. The ferromagnetic alloy in the LCL has significantly greater intergranular exchange coupling than the ferromagnetic alloy in MAG2, which typically will include segregants such as oxides. The LCL is preferably free of oxides or other segregants, which would tend to reduce intergranular exchange coupling in the LCL. Because the LCL grain boundaries overlay the boundaries of the generally segregated and decoupled grains of MAG2, and the LCL and MAG2 grains are strongly coupled perpendicularly, the LCL introduces an effective intergranular exchange coupling in the MAG2.
摘要翻译： 垂直磁记录系统和介质具有包括交换弹簧结构和铁磁横向耦合层（LCL）的多层记录层。 交换弹簧结构由两个铁磁交换磁性层（MAG1和MAG2）组成，每个具有垂直的磁各向异性。 MAG1和MAG2彼此直接接触或者位于它们之间的耦合层（CL）。 LCL与MAG2直接接触并介导MAG2中的晶间交换耦合。 LCL中的铁磁合金具有比MAG2中的铁磁合金明显更大的晶间交换耦合，其通常将包括分离子如氧化物。 LCL优选不含氧化物或其它分离剂，其倾向于降低LCL中的晶间交换偶联。 因为LCL晶界覆盖了MAG2的大致分离和去耦晶粒的边界，并且LCL和MAG2晶粒垂直强耦合，所以LCL在MAG2中引入有效的晶间交换耦合。
-
5.发明授权Perpendicular magnetic recording medium with multiple exchange-coupled magnetic layers having substantially similar anisotropy fields 有权具有多个具有基本相似的各向异性场的交换耦合磁性层的垂直磁记录介质公开(公告)号：US07550210B2
公开(公告)日：2009-06-23
申请号：US11372295
申请日：2006-03-09
申请人： Andreas Klaus Berger , Hoa Van Do , Eric E. Fullerton , Yoshihiro Ikeda , Byron Hassberg Lengsfield, III , Natacha F. Supper
发明人： Andreas Klaus Berger , Hoa Van Do , Eric E. Fullerton , Yoshihiro Ikeda , Byron Hassberg Lengsfield, III , Natacha F. Supper
IPC分类号： G11B5/66
CPC分类号： G11B5/66
摘要： A perpendicular magnetic recording medium has an “exchange-spring” type magnetic recording layer (RL) formed of two ferromagnetic layers with substantially similar anisotropy fields that are ferromagnetically exchange-coupled by a nonmagnetic or weakly ferromagnetic coupling layer. Because the write head produces a larger magnetic field and larger field gradient at the upper portion of the RL, while the field strength decreases further inside the RL, the upper ferromagnetic layer can have a high anisotropy field. The high field and field gradient near the top of the RL, where the upper ferromagnetic layer is located, reverses the magnetization of the upper ferromagnetic layer, which then assists in the magnetization reversal of the lower ferromagnetic layer. Because both ferromagnetic layers in this exchange-spring type RL have a high anisotropy field, the thermal stability of the medium is not compromised. The medium shows improved writability, i.e., a low switching field, as well as lower intrinsic media noise, over a medium with a conventional single-layer RL.
摘要翻译： 垂直磁记录介质具有由具有基本相似的各向异性场的两个铁磁层形成的“交换弹簧”型磁记录层（RL），其通过非磁性或弱铁磁耦合层进行铁磁交换耦合。 由于写头在RL的上部产生较大的磁场和较大的场梯度，而在RL内的场强进一步降低，所以上铁磁层可以具有高的各向异性场。 在RL的顶部附近的高场磁场梯度，其中上铁磁层位于其上，反转上铁磁层的磁化，其随后有助于下铁磁层的磁化反转。 由于这种交换弹簧型RL中的两个铁磁层具有高各向异性场，所以介质的热稳定性不受影响。 在具有常规单层RL的介质上，介质显示改进的可写性，即低切换场，以及较低的固有介质噪声。
-
6.发明申请PERPENDICULAR MAGNETIC RECORDING MEDIUM WITH MULTILAYER RECORDING STRUCTURE INCLUDING INTERGRANULAR EXCHANGE ENHANCEMENT LAYER 审中-公开具有多层记录结构的特殊磁记录介质，包括交互式增强层公开(公告)号：US20080138662A1
公开(公告)日：2008-06-12
申请号：US11567908
申请日：2006-12-07
申请人： Andreas Klaus Berger , Qing Dai , Hoa Van Do , Yoshihiro Ikeda , David Thomas Margulies , Natacha F. Supper , Kentaro Takano , Min Xiao
发明人： Andreas Klaus Berger , Qing Dai , Hoa Van Do , Yoshihiro Ikeda , David Thomas Margulies , Natacha F. Supper , Kentaro Takano , Min Xiao
IPC分类号： G11B5/706
摘要： A perpendicular magnetic recording medium has a multilayer recording layer (RL) structure that includes a ferromagnetic intergranular exchange enhancement layer for mediating intergranular exchange coupling in the other ferromagnetic layers in the RL structure. The RL structure may be a multilayer of a first ferromagnetic layer (MAG1) of granular polycrystalline Co alloy with Ta-oxide, a second ferromagnetic layer (MAG2) of granular polycrystalline Co alloy with Si-oxide, and an oxide-free CoCr capping layer on top of and in contact with MAG2 for mediating intergranular exchange coupling in MAG1 and MAG2. The RL structure may also be a multilayer of an intergranular exchange enhancement interlayer (IL) in between two ferromagnetic layers, MAG1 and MAG2, each with reduced or no intergranular exchange coupling. Because the IL is in direct contact with both MAG1 and MAG2, it directly mediates intergranular exchange coupling in each of MAG1 and MAG2.
摘要翻译： 垂直磁记录介质具有多层记录层（RL）结构，其包括用于介导RL结构中的其它铁磁层中的晶间交换耦合的铁磁晶间交换增强层。 RL结构可以是具有Ta氧化物的粒状多晶Co合金的第一铁磁层（MAG1），具有Si氧化物的粒状多晶Co合金的第二铁磁层（MAG 2）和不含无氧化物的CoCr的多层 在MAG1和MAG2之间介导晶间交换耦合的MAG 2顶部并与MAG 2接触的封盖层.RR结构还可以是两个铁磁层之间的晶间交换增强中间层（IL）的多层，MAG 1和MAG 2，每个都有减少或没有晶间交换耦合。 因为IL与MAG 1和MAG 2直接接触，所以它直接介导MAG1和MAG2中的每一个中的晶间交换耦合。
-
7.发明申请公开(公告)号：US20080070065A1
公开(公告)日：2008-03-20
申请号：US11532055
申请日：2006-09-14
摘要： A perpendicular magnetic recording system and medium has a multilayered recording layer that includes an exchange-spring structure and a ferromagnetic lateral coupling layer (LCL). The exchange-spring structure is made up of two ferromagnetically exchange-coupled magnetic layers (MAG1 and MAG2), each with perpendicular magnetic anisotropy. MAG1 and MAG2 are either in direct contact with one another or have a coupling layer (CL) located between them. The LCL is located in direct contact with MAG2 and mediates intergranular exchange coupling in MAG2. The ferromagnetic alloy in the LCL has significantly greater intergranular exchange coupling than the ferromagnetic alloy in MAG2, which typically will include segregants such as oxides. The LCL is preferably free of oxides or other segregants, which would tend to reduce intergranular exchange coupling in the LCL. Because the LCL grain boundaries overlay the boundaries of the generally segregated and decoupled grains of MAG2, and the LCL and MAG2 grains are strongly coupled perpendicularly, the LCL introduces an effective intergranular exchange coupling in the MAG2.
摘要翻译： 垂直磁记录系统和介质具有包括交换弹簧结构和铁磁横向耦合层（LCL）的多层记录层。 交换弹簧结构由两个铁磁交换磁性层（MAG 1和MAG 2）组成，每个具有垂直的磁各向异性。 MAG 1和MAG 2彼此直接接触或者具有位于它们之间的耦合层（CL）。 LCL位于与MAG 2直接接触并介导MAG 2中的晶间交换耦合。 LCL中的铁磁合金具有比MAG 2中的铁磁合金明显更大的晶间交换耦合，其通常将包括分离子如氧化物。 LCL优选不含氧化物或其它分离剂，其倾向于降低LCL中的晶间交换偶联。 因为LCL晶界覆盖了MAG2的大致分离和去耦晶粒的边界，并且LCL和MAG 2晶粒垂直强耦合，所以LCL在MAG2中引入有效的晶间交换耦合。
-
8.发明授权公开(公告)号：US07125616B2
公开(公告)日：2006-10-24
申请号：US10788687
申请日：2004-02-26
IPC分类号： G11B5/66
摘要： A magnetic recording disk has an antiferromagnetically-coupled (AFC) structure that has three lower ferromagnetic layers (LL1, LL2, LL3) and an upper ferromagnetic layer (UL), all four ferromagnetic layers being antiferromagnetically-coupled together across corresponding antiferromagnetically-coupling layers. The UL has a magnetization-remanence-thickness product (Mrt) greater than the Mrt each of the three lower layers LL1, LL2, LL3, and greater than the sum of the Mrt values of LL1 and LL3. The middle lower layer LL2 has an Mrt less than the Mrt of each of the other lower layers LL1 and LL3, and as a result the composite Mrt of the AFC structure is less than the composite Mrt of a conventional AFC structure having only a single lower layer. The AFC structure achieves this composite Mrt reduction without increasing the Mrt of any of the three lower layers above the maximum Mrt of the single lower layer in the conventional AFC structure.
摘要翻译： 磁记录盘具有反铁磁耦合（AFC）结构，其具有三个低铁磁层（LL 1，LL 2，LL 3）和上铁磁层（UL），所有四个铁磁层在相应的反铁磁层上反铁磁耦合在一起 - 耦合层。 UL具有大于三个下层LL 1，LL 2，LL 3中的每一个的Mrt的磁化剩磁厚度乘积（Mrt），并且大于LL 1和LL 3的Mrt值之和。 中下层LL 2的Mrt小于其他下层LL 1和LL 3中的每一个的Mrt，结果，AFC结构的复合Mrt小于仅具有传统AFC结构的复合材料Mrt 单个下层。 AFC结构在不增加传统AFC结构中单个下层的最大Mrt以上的三个下层中的任何一个的Mrt的情况下实现了该复合Mrt的还原。
-
9.发明授权公开(公告)号：US07081309B2
公开(公告)日：2006-07-25
申请号：US10808020
申请日：2004-03-23
IPC分类号： G11B5/673
摘要： A magnetic recording disk has an antiferromagnetically-coupled (AFC) structure that has an upper ferromagnetic layer (UL), and a lower ferromagnetic layer structure formed of two ferromagnetically-coupled lower layers (LL1, LL2). The UL is antiferromagnetically-coupled to the lower layer structure across an antiferromagnetically-coupling layer. LL1 and LL2 are ferromagnetically coupled across a ferromagnetic coupling layer so the magnetizations of LL1 and LL2 remain parallel in each remanent magnetic state, but are antiparallel to the magnetization of the UL in each remanent magnetic state. The UL has an Mrt greater than the sum of the Mrt values of LL1 and LL2.
摘要翻译： 磁记录盘具有反铁磁耦合（AFC）结构，其具有上铁磁层（UL）和由两个铁磁耦合的下层（LL 1，LL 2）形成的低铁磁层结构。 UL通过反铁磁耦合层与下层结构反铁磁耦合。 LL 1和LL 2横跨铁磁耦合层铁磁耦合，因此LL 1和LL 2的磁化在每个剩余磁性状态下保持平行，但在每个剩余磁状态下与UL的磁化反平行。 UL具有大于LL1和LL2的Mrt值之和的Mrt。
-
10.发明授权Disk drive with laminated magnetic thin films with sublayers for magnetic recording 有权具有层叠磁性薄膜的磁盘驱动器，具有用于磁记录的子层公开(公告)号：US07976964B2
公开(公告)日：2011-07-12
申请号：US11084402
申请日：2005-03-18
IPC分类号： G11B5/66
摘要： The invention includes a disk drive with a magnetic recording disk with an upper and lower sublayer in at least one magnetic layer of a laminated magnetic layer structure that includes a spacer layer that substantially decouples the magnetic layers. The lower sublayer has a lower boron content than the upper sublayer and a preferred embodiment is CoPtCrBTa. The upper sublayer is deposited onto the lower sublayer and is preferably CoPtCrB with a higher boron content than the lower sublayer. The composition of the lower sublayer gives it a very low moment with low intrinsic coercivity which would not be useful as a recording layer on its own. The upper sublayer is a higher moment alloy with high intrinsic coercivity. An embodiment of the invention includes a laminated magnetic layer structure which is antiferromagnetically coupled to a lower ferromagnetic layer.
摘要翻译： 本发明包括具有磁记录盘的磁盘驱动器，该磁盘驱动器具有在层叠磁性层结构的至少一个磁性层中具有上和下子层的磁记录盘，该磁层包括使磁性层基本上分离的间隔层。 下层具有比上层更低的硼含量，优选实施方案是CoPtCrBTa。 上部子层沉积在下部子层上，优选的是具有比下部子层更高的硼含量的CoPtCrB。 下层的组成使得其具有低固有矫顽力的非常低的力矩，其本身不会用作记录层。 上层是具有高固有矫顽力的较高的力矩合金。 本发明的实施例包括层叠的磁性层结构，其被反铁磁耦合到下铁磁层。
-
-
-
-
-
-
-
-
-
搜索结果
31 条记录 (耗时 0.023 秒)
