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41. 发明申请

US20220157335A1 MAGNETIC HEAD AND MAGNETIC RECORDING DEVICE 有权
公开(公告)号：US20220157335A1
公开(公告)日：2022-05-19
申请号：US17398516
申请日：2021-08-10
申请人： KABUSHIKI KAISHA TOSHIBA , TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION
发明人： Hitoshi IWASAKI , Naoyuki NARITA , Hirofumi SUTO , Masayuki TAKAGISHI , Tazumi NAGASAWA
IPC分类号： G11B5/127
摘要： According to one embodiment, a magnetic head includes a first magnetic pole, a second magnetic pole, and a stacked body provided between the first and second magnetic poles. The stacked body includes a first magnetic member, a second magnetic member provided between the first and second magnetic members, and a first layer provided between the first and second magnetic members, and including at least one selected from the group consisting of Cr, V, Mn, Ti and Sc. The first magnetic member includes first magnetic regions and a first non-magnetic region. A direction from one of the first magnetic regions toward another one of the first magnetic regions is along a first direction from the first magnetic pole toward the second magnetic pole. The first non-magnetic region is between the one of the first magnetic regions and the other one of the first magnetic regions.

42. 发明申请

US20210375308A1 MAGNETIC HEAD AND MAGNETIC RECORDING DEVICE 有权
公开(公告)号：US20210375308A1
公开(公告)日：2021-12-02
申请号：US17404909
申请日：2021-08-17
申请人： KABUSHIKI KAISHA TOSHIBA , TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION
发明人： Tazumi NAGASAWA , Naoyuki NARITA , Hirofumi SUTO , Masayuki TAKAGISHI , Tomoyuki MAEDA
IPC分类号： G11B5/235 , G11B5/31 , G11B5/127
摘要： According to one embodiment, a magnetic head includes a shield, a magnetic pole, a first magnetic layer provided between the shield and the magnetic pole, a second magnetic layer provided between the first magnetic layer and the magnetic pole, a third magnetic layer provided between the second magnetic layer and the magnetic pole, a first nonmagnetic layer provided between the shield and the first magnetic layer, a second nonmagnetic layer provided between the first magnetic layer and the second magnetic layer, a third nonmagnetic layer provided between the second magnetic layer and the third magnetic layer, and a fourth nonmagnetic layer provided between the third magnetic layer and the magnetic pole. The first and third nonmagnetic layers include one of Cu, Ag, Au, Al, and Ti. The second and fourth nonmagnetic layers include one of Ta, Pt, Ir, W, Mo, Cr, Tb, Rh, Pd, and Ru.

43. 发明申请

US20210217440A1 MAGNETIC HEAD AND MAGNETIC RECORDING DEVICE 有权
公开(公告)号：US20210217440A1
公开(公告)日：2021-07-15
申请号：US17015493
申请日：2020-09-09
申请人： KABUSHIKI KAISHA TOSHIBA , TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION
发明人： Hirofumi SUTO , Naoyuki NARITA , Tazumi NAGASAWA , Masayuki TAKAGISHI , Hitoshi IWASAKI
IPC分类号： G11B5/127 , G11B5/02 , G11B5/11
摘要： According to one embodiment, a magnetic head includes a recording portion. The recording portion includes a magnetic pole, a shield, and a stacked body provided between the magnetic pole and the shield. The stacked body includes a first magnetic layer, a first layer provided between the first magnetic layer and the magnetic pole, and a first intermediate layer provided between the first magnetic layer and the shield. The first layer contacts the magnetic pole and includes at least one selected from the group consisting of IrMn, PtMn, FeMn, PdMn, NiMn, RhMn, MnCr, and PtCr. The first intermediate layer includes at least one selected from a first group consisting of Cu, Ag, Au, Al, Cr, and Ru.

44. 发明申请

US20180374502A1 OSCILLATOR AND CALCULATING DEVICE 审中-公开
公开(公告)号：US20180374502A1
公开(公告)日：2018-12-27
申请号：US15921987
申请日：2018-03-15
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Tazumi NAGASAWA , Hirofumi SUTO , Michinaga YAMAGISHI , Taro KANAO , Koichi MIZUSHIMA
IPC分类号： G11B5/39 , G11B5/31 , G11C11/16 , G11C11/56
CPC分类号： G11B5/3909 , G11B5/3153 , G11C11/161 , G11C11/1697 , G11C11/5607 , H01L43/02 , H01L43/08 , H03B15/006
摘要： According to one embodiment, an oscillator includes a first element. The first element includes first and second magnetic layers, and a first nonmagnetic layer. The first magnetic layer includes first and second magnetic films, and a first nonmagnetic film. The second magnetic film is provided between the second magnetic layer and the first magnetic film. The first nonmagnetic layer is provided between the second magnetic film and the second magnetic layer. An orientation of a first magnetization of the first magnetic film has a reverse component of an orientation of a second magnetization of the second magnetic film. A first magnetic field is applied to the first element. The first element is in a first state when a first current flows in the first element An electrical resistance of the first element in the first state includes first and second electrical resistances repeating alternately.

45. 发明申请

US20150077883A1 MAGNETIC RECORDING APPARATUS 有权
标题翻译：磁记录装置
公开(公告)号：US20150077883A1
公开(公告)日：2015-03-19
申请号：US14483552
申请日：2014-09-11
申请人： Kabushiki Kaisha Toshiba
发明人： Kiwamu KUDO , Tazumi NAGASAWA , Hirofumi SUTO , Tao Yang , Koichi MIZUSHIMA , Rie SATO
IPC分类号： G11B5/39
CPC分类号： G11B5/314 , G11B2005/0024
摘要： According to an embodiment, a magnetic recording apparatus includes following elements. The spin torque oscillator generates a first oscillating magnetic field. The recording medium unit includes one or more recording medium layers which are stacked, each of the one or more recording medium layers including a recording medium and spin-wave lines each of which generates a second oscillating magnetic field. The write magnetic field source generates a write magnetic field. The controller is configured to control the spin torque oscillator, the spin-wave lines, and the write magnetic field source to simultaneously apply the write magnetic field, and the first and second oscillating magnetic fields to target medium magnetization in the recording medium.
摘要翻译：根据实施例，磁记录装置包括以下元件。自旋转矩振荡器产生第一振荡磁场。记录介质单元包括堆叠的一个或多个记录介质层，所述一个或多个记录介质层中的每一个包括记录介质和每个产生第二振荡磁场的旋转波线。写磁场源产生写入磁场。控制器被配置为控制自旋扭矩振荡器，自旋波线和写入磁场源，以同时施加写入磁场，以及第一和第二振荡磁场以在记录介质中的目标介质磁化强度。

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