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薄膜系における超伝導と磁性の競合に関する研究

薄膜系统中超导与磁性的竞争研究

基本信息

批准号：
60213009
负责人：
藤田敏三
金额：
$ 1.6万
依托单位：
Hiroshima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Special Project Research
财政年份：
1985
资助国家：
日本
起止时间：
1985 至无数据
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-60213009/
关键词：
強磁性超伝導体薄膜シェブレル相

项目摘要

本研究は、薄膜系における超伝導と強磁性の競合を中心に、超伝導薄膜特有の磁気的性質を実験的に解明し、ひいては、新超伝導材料の可能性を探ぐることを目的としている。前年度に引続き、Ho【Mo_6】【S_8】膜における強磁性と超伝導の共存問題と、主としてHo【Mo_6】【Se_8】の試料作成に重点をおいて研究を進めた。本年度中に得られた主な結果の概略は下記のとうりである。○Ho【Mo_6】【S_8】膜における超伝導と強磁性の共存について、われわれの発表した電気低抗と磁化の測定結果を、西独のグループが独自の試料で追試を行い、実験的にはほぼ同じ結果を得たが、彼らは超伝導領域と強磁性領域の混在と解釈した。われわれは、膜厚依存性と磁場依存性を整理し丹念に吟味しなおした結果、前の主張どうり混在ではなく共存と考えなければ説明できないことを示した。○Ho【Mo_6】【Se_8】の試料作成と超伝導性、Ho【Mo_6】【Se_8】は、バルク試料でも超伝導と強磁性的磁気秩序が共存し得る系として最近見つけられたばかりの物質であるが、その薄膜の作成については末だ成功例がない。われわれは、この物質のバルクと薄膜の両試料の作成を試みた。バルクについては、目的のシェブレル相を含む多結晶試料の作成条件をほぼ把握できた。薄膜については、X線回折で明暸にシェブレル相と確認できる試料を得るには未だ至っていない。しかし、両試料とも予想される液体ヘリウム温度での超伝導転移は確認できた。今後、両試料の質の改善をはかり、電気的および磁気的性質をより低温まで測定することによって、バルクと薄膜における超伝導と磁性の共存状態の異同が明らかになることが期待できる。本年度得た結果は、超伝導と強磁性の共存に関する基礎的でかつ発展的な研究の糸口となる重要な知見を含んでいる。

The purpose of this study is to explore the possibility of superconducting materials in the thin film system, such as the center of the superconducting magnetic field, the magnetic properties of the thin film, and the possibility of new superconducting materials. In the previous year, Ho [Mo _ 6] [S8] film supermagnetism leads to the problem of coexistence, and the main material, Ho [Mo _ 6] [Se_8], has been used to focus on the improvement of research. We have received a summary of the main results in the middle of this year. 0Ho [Mo _ 6] [S8] thin film superconductor superconductor coexist magnetic field device, test the results of the low reactance magnetization test of the computer, test the results of the low reactance magnetization test of the west independent device, compare the results of the magnetic field test, and compare the results of the test results, and the magnetic fields of the superleadership domain are mixed in the solution. Film thickness dependence, magnetic field dependence, film thickness dependence, magnetic field dependence, film thickness dependence, magnetic field dependence, film thickness dependence, magnetic field dependence, film thickness dependence, magnetic field dependence, film thickness dependence, film thickness dependence, magnetic field dependence, film thickness dependence, magnetic field dependence, magnetic field dependence, film thickness dependence, magnetic field dependence, film thickness dependence, magnetic field dependence, magnetic field dependence, film thickness dependence, film thickness dependence, magnetic field dependence, magnetic field dependence, film thickness dependence, magnetic field dependence, film thickness dependence, magnetic field dependence, 0Ho [Mo _ 6] [Se_8] materials are made into super-magnetic properties, Ho [Mo _ 6] [Se_8] and Ho [Mo _ 6] [HOS] materials. The magnetic order of strong magnetism coexists in the system. You have recently seen that the material quality is very high. The material and material of the film are used to make a test. In order to improve the performance of the system, the purpose of this paper is to determine the conditions for the formation of multi-crystal materials. The film, X-ray, X-ray and X-ray. If you want to change the temperature of the liquid, please make sure that you do not want to change the temperature. In the future, we will improve the performance of the electrical and mechanical magnets of the electrical equipment and electronics. in the future, we will be able to improve the performance of the electrical and mechanical magnets of the electrical equipment and electronics. in the future, we will improve the properties of the electrical and electrical magnets of the electrical equipment and electronics. in the future, we will improve the properties of the electrical and electrical magnets of the electrical and electronic machines. The results of this year, the results of the study of the results of this year, the results of the study of the results of the year, the results of the study of the results of the year, the results of this year's results and the results of this year.