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1. 发明授权

US09275672B2 Magnetic head, magnetic recording method and apparatus for controlling magnetic head with spin torque oscillator in a disk drive 有权
标题翻译：磁头，磁记录方法以及用于在磁盘驱动器中用旋转扭矩振荡器控制磁头的装置
公开(公告)号：US09275672B2
公开(公告)日：2016-03-01
申请号：US13762752
申请日：2013-02-08
申请人： HITACHI, LTD.
发明人： Yoshihiro Shiroishi , Hiroshi Fukuda , Harukazu Miyamoto , Junko Ushiyama , Katsuro Watanabe , Yoshiyuki Hirayama , Masukazu Igarashi
IPC分类号： G11B21/02 , G11B5/02 , G11B27/36 , G11B13/04 , G11B5/127 , G11B5/31 , G11B5/23 , G11B5/00
CPC分类号： G11B13/04 , G11B5/1278 , G11B5/23 , G11B5/3146 , G11B2005/0024
摘要： A microwave assisted magnetic recording head includes a recording magnetic pole unit that produces a recording field for writing to a perpendicular magnetic recording medium, and a high-frequency magnetic field oscillator that produces a high-frequency magnetic field. The recording magnetic pole unit includes a magnetic core with a write gap portion at which a main recording field component is concentrated, and the high-frequency magnetic field oscillator is disposed in the write gap.
摘要翻译：微波辅助磁记录头包括产生用于写入垂直磁记录介质的记录场的记录磁极单元和产生高频磁场的高频磁场振荡器。记录磁极单元包括具有主记录场分量集中的写间隙部分的磁芯，并且高频磁场振荡器设置在写间隙中。

2. 发明授权

US08917481B2 High frequency magnetic field assisted magnetic recording head, and method of manufacturing same 有权
标题翻译：高频磁场辅助磁记录头及其制造方法
公开(公告)号：US08917481B2
公开(公告)日：2014-12-23
申请号：US14255035
申请日：2014-04-17
申请人： Hitachi, Ltd.
发明人： Kikuo Kusukawa , Junichiro Shimizu , Katsuro Watanabe
IPC分类号： G11B5/127 , G11B5/187 , G11B5/31 , G11B5/00
CPC分类号： G11B5/187 , G11B5/3146 , G11B5/315 , G11B5/3163 , G11B2005/0024
摘要： Provided are a structure of a high frequency magnetic field assisted magnetic recording head in which the positional relationship of a main magnetic pole and a spin torque oscillator in a cross-track direction is accurately determined, and in which variations are not caused in high frequency magnetic field assist characteristics, and a method of manufacturing the structure. The high frequency magnetic field assisted magnetic recording head includes a main magnetic pole, a spin torque oscillator disposed on the main magnetic pole, and an insulating side gap covering a side surface of the main magnetic pole and a side surface of the spin torque oscillator. The main magnetic pole and the spin torque oscillator are formed between both side surfaces of the side gap. Thus, a self-alignment structure of the high frequency magnetic field assisted magnetic recording head is obtained.
摘要翻译：提供了一种高频磁场辅助磁记录头的结构，其中准确地确定了主磁极和自旋扭矩振荡器在交叉轨道方向上的位置关系，并且其中在高频磁体中不引起变化场辅助特性，以及制造该结构的方法。高频磁场辅助磁记录头包括主磁极，设置在主磁极上的自旋扭矩振荡器和覆盖主磁极的侧表面和自旋扭矩振荡器的侧表面的绝缘侧间隙。主磁极和自旋扭矩振荡器形成在侧间隙的两个侧表面之间。因此，获得高频磁场辅助磁记录头的自对准结构。

3. 发明授权

US08830627B2 Magnetic head, method for producing the magnetic head, and magnetic recording/reproducing apparatus 有权
标题翻译：磁头，磁头的制造方法以及磁记录/重放装置
公开(公告)号：US08830627B2
公开(公告)日：2014-09-09
申请号：US13735163
申请日：2013-01-07
申请人： Hitachi, Ltd.
发明人： Kenji Sugiura , Katsuro Watanabe , Masukazu Igarashi , Yo Sato
IPC分类号： G11B5/02
CPC分类号： G11B5/1276 , G11B5/1278 , G11B5/3146 , G11B5/3163 , G11B2005/0024
摘要： In a magnetic head of a high-frequency magnetic field assisted recording system, a width of a high-frequency magnetic field from an oscillator is decreased to enhance an oscillation frequency, in order to realize a high-density recording. An oscillator provided near a main pole, which generates a recording magnetic field, for generating a high-frequency magnetic field is patterned by a conventional photolithography, and then, an oxidation, nitridation, or oxynitridation is performed on the side face in a track width direction. With this process, an oxide layer, a nitride layer, or an oxynitride layer, which is made of a material of the oscillator, is formed on the side face of the oscillator in the track width direction, and the shape of the oscillator is formed to be semi-circular.
摘要翻译：在高频磁场辅助记录系统的磁头中，降低来自振荡器的高频磁场的宽度，以提高振荡频率，以实现高密度记录。通过常规的光刻技术对构成用于产生高频磁场的产生记录磁场的主极附近的振荡器进行图案化，然后在轨道宽度的侧面进行氧化，氮化或氧氮化方向。通过该处理，在振荡器的轨道宽度方向的侧面上形成由振荡器材料构成的氧化物层，氮化物层或氧氮化物层，形成振荡器的形状半圆形。

4. 发明授权

US09007721B2 Microwave assisted magnetic recording head having spin torque oscillator, and magnetic recording apparatus 有权
标题翻译：具有自旋扭矩振荡器的微波辅助磁记录头和磁记录装置
公开(公告)号：US09007721B2
公开(公告)日：2015-04-14
申请号：US13957464
申请日：2013-08-02
申请人： Hitachi, Ltd.
发明人： Yo Sato , Katsuro Watanabe , Keizou Katou , Masukazu Igarashi
IPC分类号： G11B5/31 , G11B5/17 , G11B5/02 , G11B5/00
CPC分类号： G11B5/17 , G11B5/3146 , G11B2005/0024
摘要： A spin torque oscillator is provided which is adapted to high data transfer rates and which can perform assisted magnetic recording of sufficient magnitude. A spin torque oscillator is provided with a stacked spin injection layer and a high frequency magnetic field generation layer. The stacked spin injection layer has a stacked structure in which a first magnetic layer, a coupling layer, and a second magnetic layer are stacked in the order mentioned from a far side as viewed from the high frequency magnetic field generation layer. Magnetization of the first magnetic layer and magnetization of the second magnetic layer are coupled antiparallel to each other. A polarity of the magnetization of the second magnetic layer is reversed temporally earlier than a magnetic field polarity reversal of a leakage magnetic field from the main magnetic pole.
摘要翻译：提供了一种自适应转矩振荡器，适用于高数据传输速率，可以执行足够大的辅助磁记录。自旋扭矩振荡器设置有堆叠的自旋注入层和高频磁场产生层。叠层自旋注入层具有层叠结构，其中从高频磁场产生层观察，从远侧按顺序堆叠第一磁性层，耦合层和第二磁性层。第一磁性层的磁化和第二磁性层的磁化彼此反平行地耦合。第二磁性层的磁化的极性在时间上比来自主磁极的漏磁场的磁场极性反转更早。

5. 发明授权

US08953282B2 Magnetic head, and magnetic storage apparatus 有权
标题翻译：磁头和磁存储装置
公开(公告)号：US08953282B2
公开(公告)日：2015-02-10
申请号：US13960270
申请日：2013-08-06
申请人： Hitachi, Ltd.
发明人： Yoshihiro Shiroishi , Katsuro Watanabe , Yo Sato
IPC分类号： G11B5/127 , G11B15/18 , G11B5/39
CPC分类号： G11B5/3909 , G11B5/235 , G11B5/3106 , G11B5/3146 , G11B5/3945 , G11B5/3967 , G11B2005/0024 , Y10T428/1114 , Y10T428/1121 , Y10T428/1171
摘要： In a Spin Torque Oscillator (STO) comprising an underlayer, a first magnetic layer disposed on the underlayer, a non-magnetic intermediate layer disposed on the first magnetic layer, and a second magnetic layer disposed on the non-magnetic intermediate layer, the non-magnetic intermediate layer is a non-magnetic alloy containing 50 at % or more of at least one kind of element selected from a first group consisting of Cu, Ag, and Au, and further at least 0.1 at % or more in total of at least one kind of element selected from a second group consisting of Cu, Ag, Au, Cr, Ti, Zr, Hf, V, Nb, Ta, Ru, Os, Pd, Pt, Rh, and Ir that does not overlap with the element from the first group.
摘要翻译：在包括底层的旋转扭矩振荡器（STO）中，设置在底层上的第一磁性层，设置在第一磁性层上的非磁性中间层以及设置在非磁性中间层上的第二磁性层，磁性中间层是含有选自Cu，Ag和Au的第一组中的至少一种元素的50at％或更多的非磁性合金，并且还含有至少0.1at％以上的元素选自不与Cu，Ag，Au，Cr，Ti，Zr，Hf，V，Nb，Ta，Ru，Os，Pd，Pt，Rh和Ir组成的第二组中的至少一种元素元素来自第一组。

6. 发明授权

US08937789B2 Microwave assisted magnetic recording head and magnetic data storage apparatus 有权
标题翻译：微波辅助磁记录头和磁数据存储装置
公开(公告)号：US08937789B2
公开(公告)日：2015-01-20
申请号：US13912229
申请日：2013-06-07
申请人： Hitachi, Ltd.
发明人： Katsuro Watanabe , Masukazu Igarashi
IPC分类号： G11B5/31 , G11B5/147 , G11B5/23 , G11B5/00
CPC分类号： G11B5/147 , G11B5/314 , G11B5/3146 , G11B5/315 , G11B2005/0024
摘要： To suppress a spread of not only a recording magnetic field generated from a main pole but also a high-frequency magnetic field generated from a spin torque oscillator in a microwave assisted magnetic recording head. The main pole and the spin torque oscillator are surrounded by a trailing shield layer and are also surrounded by a side/leading shield layer with an insulator sidegap layer interposed therebetween, and a high-frequency magnetic field shield layer, which absorbs a high-frequency magnetic field generated from the spin torque oscillator, is arranged in at least part of the shield layers.
摘要翻译：抑制从主极产生的记录磁场的扩散，还抑制由微波辅助磁记录头中的自旋扭矩振荡器产生的高频磁场。主极和自旋转矩振荡器由后屏蔽层包围，并且还被侧面/前导屏蔽层包围，其间插入有绝缘体侧隙层，以及高频磁场屏蔽层，其吸收高频从自旋扭矩振荡器产生的磁场被布置在屏蔽层的至少一部分中。

7. 发明授权

US08883327B2 Microwave assisted magnetic recording medium and information recording apparatus using the same 有权
标题翻译：微波辅助磁记录介质和使用其的信息记录装置
公开(公告)号：US08883327B2
公开(公告)日：2014-11-11
申请号：US13798349
申请日：2013-03-13
申请人： Hitachi, Ltd.
发明人： Yoshiyuki Hirayama , Masukazu Igarashi , Katsuro Watanabe
IPC分类号： G11B5/66 , G11B5/74 , G11B5/65 , G11B5/64 , G11B5/02 , G11B5/68 , G11B5/718 , G11B5/00
CPC分类号： G11B5/68 , G11B5/02 , G11B5/64 , G11B5/65 , G11B5/66 , G11B5/718 , G11B5/746 , G11B2005/0024
摘要： Provided is a magnetic recording medium achieving both of reduction in switching field distribution and reduction in switching field intensity by high-frequency magnetic field, thus enabling high-density recording. Magnetic grains of the magnetic recording medium are made up of a recording layer and a resonance layer. The resonance layer is disposed closer to a protective layer 5 than the recording layer, and a magnetic material of the recording layer has anisotropy field 1.2 times or more anisotropy field of a magnetic material of the resonance layer. The magnetic material of the recording layer has saturation magnetization substantially equal to saturation magnetization of the magnetic material of the resonance layer. At the entire resonance layer and a part of the recording layer, the magnetic grains are separated from surrounding magnetic grains by a nonmagnetic material, and at a part of the recording layer, the magnetic grains are coupled with surrounding magnetic grains.
摘要翻译：提供了一种磁记录介质，其通过高频磁场实现开关场分布的减小和开关场强的降低，从而实现高密度记录。磁记录介质的磁性颗粒由记录层和谐振层组成。谐振层设置成比记录层更靠近保护层5，并且记录层的磁性材料具有共振层的磁性材料的各向异性场的1.2倍以上的各向异性场。记录层的磁性材料具有与谐振层的磁性材料的饱和磁化强度基本相等的饱和磁化强度。在整个共振层和记录层的一部分，磁性颗粒通过非磁性材料与周围的磁性颗粒分离，并且在记录层的一部分，磁性颗粒与周围的磁性颗粒结合。

8. 发明授权

US08854768B2 Magnetic head and magnetic recording/reproducing apparatus 有权
标题翻译：磁头和磁记录/再现装置
公开(公告)号：US08854768B2
公开(公告)日：2014-10-07
申请号：US14167287
申请日：2014-01-29
申请人： Hitachi, Ltd.
发明人： Kenji Sugiura , Yo Sato , Masukazu Igarashi , Katsuro Watanabe
IPC分类号： G11B5/31
CPC分类号： G11B5/3133 , G11B2005/0005
摘要： To realize a highly reliable magnetic head for a high-frequency magnetic field assisted recording system by preventing current crowding in an oscillator and increasing the current resistance of the oscillator. Between a main pole that generates a recording magnetic field and a trailing shield, an oscillator that includes a non-magnetic metal layer, a spin injection pinned layer, an intermediate layer, and a high-frequency magnetic field generation layer and that generates a high-frequency magnetic field is disposed. The non-magnetic metal layer adjacent to the main pole is tapered with the width gradually increasing from the trailing side toward the leading side.
摘要翻译：通过防止振荡器中的电流拥挤并增加振荡器的电流电阻，实现用于高频磁场辅助记录系统的高度可靠的磁头。在产生记录磁场的主极与后屏蔽之间，包括非磁性金属层的振荡器，自旋注入钉扎层，中间层和高频磁场产生层，并产生高设置了频率磁场。与主极相邻的非磁性金属层的宽度从后侧向前方逐渐增大。

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