Method and device for detecting magnetization
文献类型：专利
| 作者 | KATAGIRI YOSHIMASA; UKITA HIROO |
| 发表日期 | 1991-03-01 |
| 专利号 | JP1991049061A |
| 著作权人 | NIPPON TELEGR & TELEPH CORP |
| 国家 | 日本 |
| 文献子类 | 发明申请 |
| 其他题名 | Method and device for detecting magnetization |
| 英文摘要 | PURPOSE:To detect magnetization with a high sensitivity by disposing an objective magnetized medium and a reference magnetized film to a semiconductor quantum well laser to constitute an external resonance laser and detecting the direction of the magnetization by the oscillation and non-oscillation of the laser. CONSTITUTION:The current density to be implanted to the semiconductor quantum well laser 1 is set larger than the threshold current for the laser 1 to oscillate when the direction of the magnetization of the reference magnetized film 2 and the direction of the magnetization of the objective magnetized medium 3 are reverse. The magnetized medium 3 is rotated around its shaft of rotation while a prescribed spacing to an air floating slider 6 is maintained and the the air floating slider 6 is swept relative to the magnetized medium 3, then if the direction of the magnetization of the magnetized medium 3 is reverse from the direction of the magnetization of the reference magnetized film 2, the laser 1 oscillates. The direction of the magnetization of the magnetized medium 3 is, therefore, detected with the high sensitivity if the oscillation and non-oscillation of the laser 1 are detected by a photodetector 5. |
| 公开日期 | 1991-03-01 |
| 申请日期 | 1989-07-17 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/59643]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | NIPPON TELEGR & TELEPH CORP |
| 推荐引用方式 GB/T 7714 | KATAGIRI YOSHIMASA,UKITA HIROO. Method and device for detecting magnetization. JP1991049061A. 1991-03-01. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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