公开(公告)号：US20140160598A1

公开(公告)日：2014-06-12

申请号：US13915529

申请日：2013-06-11

Applicant: Kabushiki Kaisha Toshiba

Inventor： Masahiro TAKASHITA ,  Shuichi MURAKAMI ,  Naoki HASE ,  Katsuhiko KOUI

IPC: G11B5/147

CPC classification number: G11B5/147 ,  G11B5/235 ,  G11B5/3136 ,  G11B5/3146 ,  G11B2005/0024

Abstract: A magnetic head includes a main magnetic pole, a trailing shield that forms a magnetic circuit with the main magnetic pole, a spin torque oscillator that is provided between the main magnetic pole and the trailing shield, a first cooling layer that partially has a Heusler structure, and a second cooling layer that is provided on the first cooling layer and mainly comprised of silver. The first cooling layer and the second cooling layer are provided either between the main magnetic pole and spin torque oscillator or between the trailing shield and the spin torque oscillator, with either of the two cooling layers being disposed closer to the spin torque oscillator. A third cooling layer may be formed to be in contact with the first cooling layer.

Abstract translation: 磁头包括主磁极，与主磁极形成磁路的后屏蔽，设置在主磁极和后屏蔽之间的自旋扭矩振荡器，部分具有赫斯勒结构的第一冷却层 ，以及设置在第一冷却层上并主要由银构成的第二冷却层。 第一冷却层和第二冷却层设置在主磁极和自旋扭矩振荡器之间，或者设置在后挡板和自旋扭矩振荡器之间，两个冷却层中的任一个设置得更靠近自旋扭矩振荡器。 第三冷却层可以形成为与第一冷却层接触。

公开(公告)号：US20140002926A1

公开(公告)日：2014-01-02

申请号：US14019110

申请日：2013-09-05

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Takuya MATSUMOTO ,  Kenichiro YAMADA ,  Masayuki TAKAGISHI ,  Katsuhiko KOUI ,  Hitoshi IWASAKI

IPC: G11B5/127

CPC classification number: G11B5/1278 ,  G11B5/3133

Abstract: According to one embodiment, a magnetic head includes a main pole configured to apply a recording magnetic field to a recording layer of a recording medium, a return pole opposed to the main pole with a write gap therebetween, and a high-frequency oscillator between respective facing surfaces of the main pole and the return pole and configured to produce a high-frequency magnetic field. At least one of the main and return poles faces the high-frequency oscillator and includes a laminated structure portion includes a magnetic layer and a nonmagnetic layer laminated to one another.

Abstract translation: 根据一个实施例，磁头包括：主极，被配置为向记录介质的记录层施加记录磁场;与主极相对的返回极与它们之间具有写入间隔;以及高频振荡器， 主极和返回极的面对表面，并被配置为产生高频磁场。 主极和返极两者中的至少一个面向高频振荡器，并且包括层叠结构部分，其包括彼此层叠的磁性层和非磁性层。

公开(公告)号：US20140002924A1

公开(公告)日：2014-01-02

申请号：US13680363

申请日：2012-11-19

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Kenichiro YAMADA ,  Takuya MATSUMOTO ,  Naoyuki NARITA ,  Tomoko TAGUCHI ,  Katsuhiko KOUI ,  Akihiko TAKEO

IPC: G11B5/17 ,  G11B19/20

CPC classification number: G11B5/17 ,  G11B5/1278 ,  G11B5/3123 ,  G11B19/2009 ,  G11B2005/0005

Abstract: According to one embodiment, a magnetic recording head includes a disk-facing surface configured to face a recording layer of a recording medium, a main magnetic pole includes a distal end located on the disk-facing surface and configured to apply a recording magnetic field to the recording layer of the recording medium, a leading shield on a leading side of the main magnetic pole, opposed to the distal end of the main magnetic pole across a gap, a high-frequency oscillator between the leading shield and the distal end of the main magnetic pole, and a recording coil configured to excite the main magnetic pole with a magnetic field.

Abstract translation: 根据一个实施例，磁记录头包括被配置为面对记录介质的记录层的面向盘的表面，主磁极包括位于面向盘的表面上的远端，并被配置为将记录磁场施加到 记录介质的记录层，主磁极的前导侧的前屏蔽，与主磁极的远端相对的间隙相对，在前屏蔽和前端之间的高频振荡器 主磁极和被配置为用磁场激励主磁极的记录线圈。

公开(公告)号：US20180075868A1

公开(公告)日：2018-03-15

申请号：US15445822

申请日：2017-02-28

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Katsuhiko KOUI ,  Kenichiro YAMADA ,  Tomoko TAGUCHI

IPC: G11B5/39 ,  G11B5/127

CPC classification number: G11B5/3912 ,  G11B5/1278 ,  G11B5/1871 ,  G11B5/23 ,  G11B5/235 ,  G11B5/3116 ,  G11B5/3146 ,  G11B2005/0024

Abstract: A magnetic recording head includes a main magnetic pole extending to an air bearing surface of the magnetic recording head and having an end portion that is exposed at the air bearing surface, a magnetic shield having an end portion that is exposed at the air bearing surface and faces the end portion of the main magnetic pole with a gap therebetween, a stacked-layer element disposed in the gap, and including a first conductive layer in contact the main magnetic pole, a second conductive layer in contact with the magnetic shield, and an magnetic permeability adjusting layer disposed between the first conductive layer and the second conductive layer, and first and second terminals between which a current flows through the main magnetic pole, the stacked-layer element, and the magnetic shield when the current is supplied to one of the terminals.

公开(公告)号：US20180040359A1

公开(公告)日：2018-02-08

申请号：US15453176

申请日：2017-03-08

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Tomoaki INOKUCHI ,  Naoharu SHIMOMURA ,  Katsuhiko KOUI ,  Yuuzo KAMIGUCHI ,  Satoshi SHIROTORI ,  Kazutaka IKEGAMI ,  Hiroaki YODA

IPC: G11C11/16

CPC classification number: G11C11/1675 ,  G11C11/161 ,  G11C11/1673

Abstract: According to one embodiment, a nonvolatile memory includes a conductive line including a first portion, a second portion and a third portion therebetween, a storage element including a first magnetic layer, a second magnetic layer and a nonmagnetic layer therebetween, and the first magnetic layer being connected to the third portion, and a circuit flowing a write current between the first and second portions, applying a first potential to the second magnetic layer, and blocking the write current flowing between the first and second portions after changing the second magnetic layer from the first potential to a second potential.

公开(公告)号：US20150380022A1

公开(公告)日：2015-12-31

申请号：US14743526

申请日：2015-06-18

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Katsuhiko KOUI ,  Mariko SHIMIZU ,  Shuichi MURAKAMI ,  Kenichiro YAMADA

IPC: G11B5/35 ,  G11B5/39

CPC classification number: G11B5/35 ,  G11B5/1278 ,  G11B5/23 ,  G11B5/235 ,  G11B5/3133 ,  G11B5/3146 ,  G11B5/3912 ,  G11B2005/0024

Abstract: A magnetic recording head includes a main magnetic pole in which a recording magnetic field is generated, a write shield magnetic pole disposed alongside the main magnetic pole with a gap therebetween, a spin torque oscillator disposed within the gap and configured to generate a microwave, an anti-ferromagnetic layer disposed within the gap between the write shield magnetic pole and the spin torque oscillator, and a non-magnetic metal layer disposed within the gap between the spin torque oscillator and the anti-ferromagnetic layer.

Abstract translation: 磁记录头包括其中产生记录磁场的主磁极，与其间具有间隙的主磁极旁边设置的写保护磁极;设置在间隙内并被配置为产生微波的旋转扭矩振荡器， 设置在写入屏蔽磁极和自旋扭矩振荡器之间的间隙内的反铁磁层，以及设置在自旋扭矩振荡器和反铁磁层之间的间隙内的非磁性金属层。

公开(公告)号：US20150043106A1

公开(公告)日：2015-02-12

申请号：US14063344

申请日：2013-10-25

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Kenichiro YAMADA ,  Katsuhiko KOUI ,  Akihiko TAKEO

IPC: G11B5/127 ,  G11B5/10

CPC classification number: G11B5/1278 ,  G11B2005/0024

Abstract: According to one embodiment, a magnetic head includes a main pole configured to apply a recording magnetic field to a recording layer included in a recording medium, a trailing shield opposing the main pole in a down-track direction, with a write gap interposed therebetween, a pair of side shields opposing the main pole on opposite sides of the main pole in a cross-track direction, with respective gaps interposed therebetween, a recording coil configured to cause the main pole to generate a magnetic field, a first high-frequency oscillator interposed between the main pole and one of the side shields, and a second high-frequency oscillator interposed between the main pole and the other side shield.

Abstract translation: 根据一个实施例，磁头包括：主极，被配置为向包括在记录介质中的记录层施加记录磁场;在主磁极之间沿下行方向相对的后挡板，其间插入写入间隙; 与主极相对的主极的交叉轨道方向上相对设置的一对侧面屏蔽部，各自的间隙插入其间，配置成使主极产生磁场的记录线圈，第一高频振荡器 插入在主极和侧屏中的一个之间，以及插在主极和另一侧屏蔽之间的第二高频振荡器。

公开(公告)号：US20140177101A1

公开(公告)日：2014-06-26

申请号：US13903219

申请日：2013-05-28

Applicant: Kabushiki Kaisha Toshiba

Inventor： Katsuhiko KOUI ,  Shuichi Murakami ,  Mariko Shimizu ,  Kenichiro Yamada

IPC: G11B5/147

CPC classification number: G11B5/3146 ,  G11B5/235 ,  G11B2005/0024

Abstract: According to one embodiment, an oscillation layer of a spin torque oscillator for use in a magnetic head includes a stack of first and second metal films. The first metal film is formed by repetitively stacking a combination of first and second magnetic layers twice or more. The thickness of the first metal film is 0.4 to 5.0 nm. The first magnetic layer has a bcc structure and contains Fe. The second magnetic layer contains Co. The second metal film is made of Cu.

Abstract translation: 根据一个实施例，用于磁头的自旋扭矩振荡器的振荡层包括第一和第二金属膜的叠层。 第一金属膜通过重复堆叠第一和第二磁性层的组合而形成两次或更多次。 第一金属膜的厚度为0.4〜5.0nm。 第一磁性层具有bcc结构，并含有Fe。 第二磁性层含有Co。第二金属膜由Cu制成。

公开(公告)号：US20140078620A1

公开(公告)日：2014-03-20

申请号：US13752812

申请日：2013-01-29

Applicant: KABUSHIKI KAISHA TOSHIBA ,  TDK CORPORATION

Inventor： Satoshi SHIROTORI ,  Katsuhiko KOUI ,  Shinobu SUGIMURA ,  Norihito FUJITA ,  Akihiko TAKEO ,  Min LI ,  Ruhang DING

IPC: G11B5/147

CPC classification number: G11B5/147 ,  G11B5/1278 ,  G11B5/314 ,  G11B2005/0024

Abstract: According to one embodiment, a magnetic recording head manufacturing method includes forming a spin torque oscillator layer on a main magnetic pole layer, forming a mask on the spin torque oscillator layer, processing the spin torque oscillator layer by performing ion beam etching through the mask, and partially modifying the main magnetic pole layer through the mask. The partially modifying the main magnetic pole layer makes it possible to decrease the saturation flux density of the main magnetic pole layer in the modified portion, and form an unmodified main magnetic pole portion covered with the mask, and a modified portion around the main magnetic pole.

Abstract translation: 根据一个实施例，磁记录头制造方法包括在主磁极层上形成自旋转矩振荡器层，在自旋扭矩振荡器层上形成掩模，通过通过掩模进行离子束蚀刻来处理旋转扭矩振荡器层， 并通过掩模部分地改变主磁极层。 通过部分地改变主磁极层，可以降低修正部分中的主磁极层的饱和磁通密度，并且形成被掩模覆盖的未修改的主磁极部分，以及主磁极周围的改质部分 。

公开(公告)号：US20130314820A1

公开(公告)日：2013-11-28

申请号：US13717327

申请日：2012-12-17

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Mariko SHIMIZU ,  Katsuhiko KOUI ,  Shuichi MURAKAMI ,  Masahiro TAKASHITA

IPC: G11B5/31 ,  G11B5/48

CPC classification number: G11B5/3133 ,  G11B5/314 ,  G11B5/3146 ,  G11B5/4833 ,  G11B2005/0024

Abstract: According to one embodiment, a magnetic recording head includes a main magnetic pole, an auxiliary magnetic pole, and a spin torque oscillator formed between them. The spin torque oscillator includes a main oscillation layer and spin sink layer as an oscillation layer. The spin sink layer contains one of iron and cobalt, and at least one element selected from the group consisting of platinum, palladium, ruthenium, tantalum, chromium, terbium, gadolinium, europium, dysprosium, and samarium.

Abstract translation: 根据一个实施例，磁记录头包括主磁极，辅助磁极和在它们之间形成的自旋转矩振荡器。 自旋扭矩振荡器包括主振荡层和作为振荡层的自旋沉积层。 旋转沉积层含有铁和钴中的一种，以及选自铂，钯，钌，钽，铬，铽，钆，铕，镝和钐中的至少一种元素。