公开(公告)号：US20130070367A1

公开(公告)日：2013-03-21

申请号：US13404036

申请日：2012-02-24

申请人： Masukazu IGARASHI ,  Masato MATSUBARA ,  Keiichi NAGASAKA ,  Masato SHIIMOTO

发明人： Masukazu IGARASHI ,  Masato MATSUBARA ,  Keiichi NAGASAKA ,  Masato SHIIMOTO

IPC分类号： G11B21/02 ,  G11B5/127

CPC分类号： G11B5/1278 ,  G11B5/3146 ,  G11B2005/0024

摘要： A spin torque oscillator for microwave assisted recording includes a perpendicular free layer having a magnetic anisotropy axis in a direction perpendicular to a film surface, and an in-plane free layer composed of a magnetic film effectively having a magnetization easy plane on a film surface. When electric currents flows from the in-plane free layer side to the perpendicular free layer side, both free layers exchange spin information and thereby rotate their respective magnetizations almost antiparallel to each other and along a boundary surface with high-speed. Preferably, the perpendicular free layer is thinner than the in-plane free layer. It is also preferable that a magnetic anisotropy field of the perpendicular free layer attributable to materials should balance, in reverse directions, with an effective demagnetizing field in the perpendicular direction. Furthermore, the perpendicular free layer is preferably placed on the main pole side.

摘要翻译： 用于微波辅助记录的自旋扭矩振荡器包括在垂直于膜表面的方向上具有磁各向异性轴的垂直自由层，以及由在膜表面上具有易磁化平面的磁性膜构成的面内自由层。 当电流从平面内自由层侧流向垂直自由层侧时，两个自由层交换自旋信息，从而使它们各自的磁化几乎反平行并沿着边界表面高速旋转。 优选地，垂直自由层比平面内自由层薄。 由于材料的垂直自由层的磁各向异性场也优选在相反的方向上平衡，并且在垂直方向上具有有效的去磁场。 此外，垂直自由层优选放置在主极侧。

公开(公告)号：US20120069465A1

公开(公告)日：2012-03-22

申请号：US13208384

申请日：2011-08-12

申请人： Yo SATO ,  Keiichi NAGASAKA ,  Masato SHIIMOTO ,  Masato MATSUBARA

发明人： Yo SATO ,  Keiichi NAGASAKA ,  Masato SHIIMOTO ,  Masato MATSUBARA

IPC分类号： G11B5/127 ,  G11B5/33 ,  G11B5/596

CPC分类号： G11B5/3133 ,  G11B2005/0024

摘要： The present invention provides a spin torque oscillator that can realize stable oscillation and has high reliability. A laminated structure including a first magnetic layer 1 having a bcc crystal structure and having in-plane magnetic anisotropy and a second magnetic layer 2 having perpendicular magnetic anisotropy laminated on the first magnetic layer 1 and including a multilayer film of Co and Ni is used.

摘要翻译： 本发明提供一种能够实现稳定振荡并具有高可靠性的自旋转矩振荡器。 使用包括具有bcc晶体结构并具有面内磁各向异性的第一磁性层1和层叠在第一磁性层1上并具有Co和Ni的多层膜的具有垂直磁各向异性的第二磁性层2的叠层结构。

公开(公告)号：US20130057980A1

公开(公告)日：2013-03-07

申请号：US13404029

申请日：2012-02-24

申请人： Masato SHIIMOTO ,  Kenji SUGIURA ,  Mikito SUGIYAMA ,  Isao NUNOKAWA ,  Yo SATO ,  Katsuro WATANABE ,  Kazuhiko HOSOMI ,  Nobuo YOSHIDA

发明人： Masato SHIIMOTO ,  Kenji SUGIURA ,  Mikito SUGIYAMA ,  Isao NUNOKAWA ,  Yo SATO ,  Katsuro WATANABE ,  Kazuhiko HOSOMI ,  Nobuo YOSHIDA

IPC分类号： G11B5/127

CPC分类号： G11B5/314 ,  G11B2005/0024

摘要： The strength of a magnetic field applied from a main pole to an oscillator and the strength of a magnetic field applied from the main pole to a recording medium are improved in a magnetic recording head for microwave assisted recording.In the magnetic recording head according to the present invention, an interval between the main pole and a trailing shield at a place in a position above an air bearing surface is larger than an interval between the main pole and the trailing shield on the air bearing surface.

摘要翻译： 用于微波辅助记录的磁记录头改善了从主极施加到振荡器的磁场的强度和从主极施加到记录介质的磁场的强度。 在根据本发明的磁记录头中，在空气轴承表面上方的位置处的主极和后挡板之间的间隔大于空气轴承表面上的主极和后挡板之间的间隔 。

公开(公告)号：US20090207531A1

公开(公告)日：2009-08-20

申请号：US12365195

申请日：2009-02-04

申请人： Masato SHIIMOTO ,  Takeshi Nakagawa ,  Hiroyuki Katada ,  Naoto Ito ,  Kenichi Meguro

发明人： Masato SHIIMOTO ,  Takeshi Nakagawa ,  Hiroyuki Katada ,  Naoto Ito ,  Kenichi Meguro

IPC分类号： G11B5/33

CPC分类号： G11B5/3909 ,  B82Y10/00 ,  B82Y25/00 ,  G11B5/3912 ,  G11B5/3967 ,  G11B2005/3996

摘要： A magnetic recording read head is provided capable of achieving high reproduction output, resolution, and SNR, even at a high linear density. There is also provided a magnetic recording and reproducing device capable of achieving sufficient error bit rate. The magnetic recording read head includes a differential read head and a write head. The differential read head has a multilayer structure formed by laminating a first magnetoresistive sensor having a first free layer, a differential gap layer, and a second magnetoresistive sensor having a second free layer. Outside the multilayer structure, a pair of electrodes and a pair of magnetic shields are provided respectively. A ratio (Gl/bl) of an inside distance (Gl) between the first and second free layers to a bit length (bl) is set to 0.6 or more and 1.6 or less.

摘要翻译： 提供了能够实现高再现输出，分辨率和SNR的磁记录读取头，即使在高线性密度下也是如此。 还提供了能够实现足够的错误比特率的磁记录和再现装置。 磁记录读取头包括差分读取头和写入头。 差分读取头具有层叠具有第一自由层，差分间隙层的第一磁阻传感器和具有第二自由层的第二磁阻传感器形成的多层结构。 在多层结构之外，分别设置一对电极和一对磁屏蔽。 将第一自由层与第二自由层之间的内部距离（G1）与比特长度（b1）的比（G1 / b1）设定为0.6以上且1.6以下。