公开(公告)号：US20120230167A1

公开(公告)日：2012-09-13

申请号：US13045603

申请日：2011-03-11

申请人： Tsutomu AOYAMA ,  Tetsuya Roppongi ,  Yoshikazu Soeno ,  Kiyoshi Noguchi ,  Isamu Sato

发明人： Tsutomu AOYAMA ,  Tetsuya Roppongi ,  Yoshikazu Soeno ,  Kiyoshi Noguchi ,  Isamu Sato

IPC分类号： G11B13/04

CPC分类号： G11B5/314 ,  G11B5/1278 ,  G11B2005/0024

摘要： A microwave assisted magnetic head of the present invention includes: at least two or more auxiliary coils that are arranged in a periphery of a writing main pole; and microwave current supply means that applies microwave currents to the at least two or more auxiliary coils. The at least two or more auxiliary coils respectively include linear body parts linearly arranged on an ABS side, two of the linear body parts of the at least two or more auxiliary coils are arranged in a substantially orthogonal positional relationship, and the microwave current supply means is configured such that the microwave current supply means changes phase differences of the microwave currents applied respectively to the at least two or more auxiliary coils. Therefore, the microwave current can be easily controlled, and thus, a circularly polarized magnetic field with high magnetization inversion efficiency can be generated as an assistance magnetic field.

摘要翻译： 本发明的微波辅助磁头包括：布置在书写主极的周边中的至少两个或更多个辅助线圈; 以及微波电流供给装置，其向所述至少两个或更多个辅助线圈施加微波电流。 所述至少两个以上的辅助线圈分别包括直线状配置在ABS侧的线状体部，所述至少两个以上的辅助线圈的线状体部的两个以大致正交的位置关系配置，微波电流供给装置 被配置为使得微波电流提供装置改变分别施加到至少两个或更多个辅助线圈的微波电流的相位差。 因此，可以容易地控制微波电流，因此可以产生具有高磁化反转效率的圆极化磁场作为辅助磁场。

公开(公告)号：US20120127610A1

公开(公告)日：2012-05-24

申请号：US13297377

申请日：2011-11-16

申请人： Tsutomu AOYAMA ,  Hiroshi Ikeda ,  Isamu Sato

发明人： Tsutomu AOYAMA ,  Hiroshi Ikeda ,  Isamu Sato

IPC分类号： G11B5/17

CPC分类号： G11B5/3133 ,  G11B2005/0024

摘要： A magnetic recording method for a recording layer of a magnetic recording medium uses a thin film magnetic head with a sub-coil or a microwave radiator. In the method, a microwave spread spectrum (SS) signal is applied to the sub-coil or the microwave radiator, the microwave SS signal including a ferromagnetic resonant (FMR) frequency of the recording layer as a carrier wave within a band so as to generate an in-plane high-frequency magnetic field so that a magnetization reversal magnetic field Hsw of the recording layer is lowered. The magnetic recording is performed while the magnetization reversal magnetic field Hsw of the recording layer is lowered.

摘要翻译： 用于磁记录介质的记录层的磁记录方法使用具有子线圈或微波辐射器的薄膜磁头。 在该方法中，微波扩频（SS）信号施加到子线圈或微波辐射器，微波SS信号包括记录层的铁磁共振（FMR）频率作为频带内的载波，以便 产生平面内的高频磁场，使得记录层的磁化反转磁场Hsw降低。 在记录层的磁化反转磁场Hsw降低的同时进行磁记录。