发明名称 |
Magnetic recording and reproducing apparatus |
摘要 |
A magnetic recording and reproducing apparatus includes a magnetic recording medium including a recording layer in which at least two magnetic layers are layered on a non-magnetic substrate; and a magnetic head including a main magnetic pole for applying a recording magnetic field in a direction substantially perpendicular to a recording face of the magnetic recording medium and a microwave generating element that generates a microwave magnetic field. The relationship between a thickness Ts of a magnetic layer having a lowest magnetic anisotropy energy among the at least two magnetic layers composing the recording layer of the magnetic recording medium, and a thickness Tt of the recording layer is Ts/Tt≦0.2. The microwave generating element applies the microwave magnetic field having a width broader than the width of the recording magnetic field generated by the main magnetic pole of the magnetic head to the magnetic recording medium. |
申请公布号 |
US9299366(B2) |
申请公布日期 |
2016.03.29 |
申请号 |
US201414566028 |
申请日期 |
2014.12.10 |
申请人 |
TDK CORPORATION |
发明人 |
Aoyama Tsutomu;Kaizu Akimasa;Shinohara Tetsuhito;Soeno Yoshikazu |
分类号 |
G11B5/66;G11B5/127;G11B5/02;G11B5/31;G11B5/00 |
主分类号 |
G11B5/66 |
代理机构 |
Oliff PLC |
代理人 |
Oliff PLC |
主权项 |
1. A magnetic recording and reproducing apparatus comprising:
a magnetic recording medium including a recording layer in which at least two magnetic layers are layered on a non-magnetic substrate; and a magnetic head including a main magnetic pole for applying a recording magnetic field in a direction substantially perpendicular to a recording face of the magnetic recording medium and a microwave generating element that generates a microwave magnetic field, wherein, relationship between a thickness Ts of a magnetic layer having a lowest magnetic anisotropy energy among the at least two magnetic layers composing the recording layer of the magnetic recording medium, and a thickness Tt of the recording layer is Ts/Tt≦0.2, and wherein the microwave generating element has a width broader than a width of the main magnetic pole of the magnetic head, so that the microwave generating element applies the microwave magnetic field having a width broader than the width of the recording magnetic field generated by the main magnetic pole of the magnetic head to the magnetic recording medium. |
地址 |
Tokyo JP |