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Low Temperature Behavior of Rare Earth Compounds of Kondo-Type

近藤型稀土化合物的低温行为

基本信息

批准号：
06044084
负责人：
SAKURAI Junji
金额：
$ 4.99万
依托单位：
Toyama University
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

项目摘要

Ce compounds demonstrate various and different types of physical properties at low temperature originating from the competition between the Kondo interaction and the RKKY interaction between magnetic spins. We, the member of the research group in Toyama studying low temperature and magnetic properties have been collaborating with the research group in Grenoble in France which is well known in the world for famous and active works studying the same field. Toyama group made several Ce compounds, measured magnetic and thermal properties of them and found the heavy fermion properties, Kondo properties and interesting magnetic properties of them. Grenoble group made neutron experiment and very low temperature measurements on these samples.One of big achievements for Toyama group was an installment of a dilution refrigerator of Grenoble type in our laboratory in Toyama. The dilution refrigerator of Grenoble type was installed for the first time in Japan. It is easy to handle and it has no 1K … More pot which other dilution refrigerator, that of Oxford company for example, usually have. It started recently to enable us to measure electric resistivity and other properties down to low temperature of mK range. Grenoble group provided us technical helps and supports for eliminating the noises, the accurate measurements of temperature and for minimizing the heat production in the dilution refrigerator which has very small cooling power at temperature of mK range.Another big event of us was the organization of a Japan-France seminar on "Magnetic, electrical and thermal properties of rare earth compounds" on March 13th to 15th, 1996, held in Toyama. The number of participants was 31. Among them we count eight research workers in Toyama University and Toyama Prefectural University, ten French research workers, all very active and known for their famous works, and thirteen research workers in other universities in Japan, from Hokkaido to Okinawa, who are leading frontier researches. Every participants made oral speeches for twenty to forty five minutes. Discussions were fruitful and hot. The seminar was an utmost event to commemorate the close cooperation between Toyama and Grenoble. We are going to publish in this year the proceedings of the seminar as a "Supplement of Journal of Physical Society of Japan", which will be of high value for workers in this field. Less

Ce化合物在低温下表现出多种不同类型的物理性质，这些性质源于磁自旋之间的Kondo相互作用和RKKY相互作用之间的竞争。我们作为研究低温和磁特性的富山研究小组的成员，一直与法国格勒诺布尔的研究小组合作，该小组因研究同一领域的著名和活跃的工作而闻名于世。富山小组制备了几种Ce化合物，测量了它们的磁性质和热性质，发现了它们的重费米子性质、近藤性质和有趣的磁性质。格勒诺布尔小组对这些样品进行了中子实验和极低温测量。富山小组的一大成就是在我们富山的实验室安装了格勒诺布尔型稀释制冷机。日本首次设置格勒诺布尔型稀释制冷机。它易于操作，并且没有其他稀释冰箱（例如牛津公司的稀释冰箱）通常有的1K ... 更多锅。最近开始使用它，使我们能够测量低至 mK 范围的低温的电阻率和其他特性。格勒诺布尔集团为我们提供了技术帮助和支持，以消除噪音、精确测量温度以及最大限度地减少稀释制冷机中的热量产生，稀释制冷机在mK范围的温度下冷却能力非常小。我们的另一件大事是于1996年3月13日至15日在富山举办了“稀土化合物的磁、电和热性能”日法研讨会。参加人数为31人。其中富山大学和富山县立大学的研究人员8名，法国研究人员10名，他们都很活跃并以著名的作品闻名，日本其他大学的研究人员有13名，从北海道到冲绳，他们都是前沿研究的带头人。每位参加者都进行了二十至四十五分钟的口头演讲。讨论富有成果且热烈。此次研讨会是纪念富山县与格勒诺布尔市密切合作的一次盛大活动。今年我们将把这次研讨会的论文集作为《日本物理学会杂志增刊》出版，这对于该领域的工作者来说将具有很高的价值。较少的