Research on the Optical Current-Transformer Using Fe-Mn Diluted Magnetic Semiconductor Films as a Faraday Rotator

采用铁锰稀磁半导体薄膜作为法拉第旋转器的光学电流互感器的研究

• 批准号: 10650327
• 负责人: IMAMURA Masaaki
• 金额: $ 2.11万
• 依托单位: Fukuoka Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10650327/
• 关键词: Diluted Magnetic Semiconductor; Faraday Rotation; Magneto-Optical Films; Molecular Beam Epitaxy; Optical Current Transformer; 光磁気センサ; 光CT; CdFeTe

The optical current transformer (OCT) was scarcely used in applications so far. Recently some new researches on the OCT have been begun for its practical application and improvements of performance. The purpose of those researches is to develop the OCTs that can be incorporated into electric power devices like the circuit-breakers, taking full advantage of the OCT that is light weight, small size and good isolation.In this research, the possibility of applying diluted magnetic semiconductor (DMS) films prepared by using Molecular Beam Epitaxy to the optical current transformer is studied. And magneto-optical properties of the DMS films are investigated to accomplish the purpose of our research plan.(Year : 1998)It has been confirmed that the optical current transformer can be applied to the current measurements in the flat-shape bus-bars used for the three-phase low power distribution equipment of 3000 〜 6000 V. The OCTs for such applications should be further improved in terms of opti … More cal loss.The investigation about the M-0 properties of DMS films has shown the following :(1) The specific rotation of the CdFeTe films is one or two orders of magnitude larger than that in the CdMnTe films. (2) The specific rotation of the CdFeTe films exhibits a positive sigh in the wavelength region of 550-750nm, although it in the CdMnTe films is almost negative in the same region. (3) Since Fe ions do not widen the optical band gap as Mn ions do, transparency is not improved in the visible wavelength region.(Year : 1999)Magneto-optical properties in the visible wavelength region have been studied on four-element semimagnetic semiconductor CdMnCoTe films deposited on quartz glass substrate by using MBE equipment. The value of Faraday rotation of 0.3 deg/cmG in the CdィイD20.647ィエD2MnィイD20.34ィエD2CoィイD20.013ィエD2Te film has been observed at 570 nm. This is approximately two times larger than that of the CdィイD20.61ィエD2MnィイD20.39ィエD2Te film on quartz glass. It has been confirmed by using vibrating sample magnetometer (VSM) that the CdィイD20.647ィエD2MnィイD20.34ィエD2CoィイD20.013ィエD2Te film prepared is paramagnetic. Less

到目前为止，光学电流互感器(OCT)在实际应用中还很少。近年来，随着OCT在实际中的应用和性能的提高，一些新的研究也开始了。这些研究的目的是充分利用OCT重量轻、体积小、隔离性好的特点，开发出可集成到断路器等电力设备中的OCT。本文研究了将分子束外延制备的稀磁半导体(DMS)薄膜应用于光学电流互感器的可能性。并对其磁光性能进行了研究。(1998年)光学电流互感器已被证实可用于3000~6000V三相小功率配电设备用扁平母线的电流测量。用于此类应用的光学电流互感器在Opti…方面有待进一步改进。对DMS薄膜的M-0特性的研究表明：(1)Cd FeTe薄膜的比旋度比Cd MnTe薄膜大一个或两个数量级。(2)在550-750 nm的波长范围内，CdFeTe薄膜的比旋转角几乎为负，而在550-750 nm的波长范围内，其比旋转角几乎为负。(3)由于Fe离子没有像Mn离子那样展宽光学带隙，因此在可见光波段的透过率没有得到改善。(年份：1999)利用分子束外延设备在石英玻璃衬底上制备了四元半磁半导体薄膜CdMnCoTe。在570 nm处观察到CdィイD20.647ィエD2MnィイD20.34ィエD2CoィイD20.013ィエD2Te薄膜的法拉第旋转值为0.3deg/cmg。这大约是石英玻璃上CdィイD20.61ィエD2MnィイD20.39ィエD2Te薄膜的两倍。用振动样品磁强计证实了所制备的CdィイD20.647ィエD2MnィイD20.34ィエD2CoィイD20.013ィエD2Te薄膜是顺磁性的。较少

项目成果

田中優光: "分子線エピタキシャル法によるCdFeTe薄膜の作成とその基礎特性"福岡工業大学研究論集. vol.31,No2. 305-309 (1999)

Yumitsu Tanaka：“分子束外延法制备CdFeTe薄膜及其基本性能”福冈工业大学研究杂志第31卷第2. 305-309期（1999年）。

今村,田中: "Magneto-optical Propertig of Diluted Magnetic Semiconductor Cd Fe Te Films Depositecl on Quarty Glass Substrates"Digest of International Magnetics Couf.. FD-07 (1999)

Imamura, Tanaka：“石英玻璃基板上沉积的稀磁半导体 Cd Fe Te 薄膜的磁光特性”国际磁学文摘.. FD-07 (1999)

今村, 中原, 山口, 田中: "Analysis of Magnetic Fields due to Fhree-Phase Busbar Current for Design of the Optical Current-Transformer"IEEE Transactons on Magnetics. vol. 34 No.4. 2274-2279 (1998)

Imamura、Nakahara、Yamaguchi、Tanaka：“光学电流互感器设计中三相母线电流的磁场分析”，IEEE Transactons on Magnetics，第 34 卷，第 4 卷，2274-2279 (1998)

今村正明: "Analysis of Magnetic Fields due to Three-Phase Busbar Current for Design of the Optical Current-Transforner"IEEE Transactions on Magnetics. vol.34,No.4. 2274-2279 (1998)

Masaaki Imamura：“用于光学电流互感器设计的三相母线电流的磁场分析”IEEE 磁学学报第 34 卷，第 4 期（1998 年）。

今村正明: "Aralysis of Magnetic Field due to Fhree-Plase Busbar Current for Design of the Optical Current-Transformer" IEEE Transactions on Magnetics. Vol34・No.4. 2274-2279 (1998)

Masaaki Imamura：“光学电流互感器设计中因三次母线电流引起的磁场分析”IEEE Transactions on Magnetics Vol34·No.4 (1998)。