High-Quality Single Crystal Growth of Rare Earth Inter metallic compounds under Ultra-high vacuum

超高真空下稀土金属间化合物的高质量单晶生长

• 批准号: 03554006
• 负责人: ONUKI Yoshichika
• 金额: $ 2.62万
• 依托单位: University of Tsukuba
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03554006/
• 关键词: Ultra-high vacuum; zone melting; Crystal Growth; Heavy Electrons; Rare Earth Compounds; CeRu_2Si_2; LaRh_2

We have constructed the zone-melting rf furnace under a ultra-high vacuum condition. An ingot of the rare earth compound is set on the boat-like Cu-hearth which is cooled by water. When this ingot passes through the rf working coil, it melts partially and grows as an single crystal.(1)The single crystals of CeRu_2Si_2 were first grown by the tri-arc Chochralski pulling method in an argon gas atmosphere and were annealed at 1500ﾟC under a high vacuum of 1x10^<-8>torr for five hours. The residual resistivity ratio of the obtained sample was 250, indicating good quality of the crystal. By using this high-quality sample we have observed a super-heavy carrier with the large cyclotron mass 120m_0.(2)We have also succeeded in growing a single crystal of LaRh_2 by a zone-melting method in the present furnace. The sweep-speed for zone-melting was 5mm/hr. An obtained single crystal ingot was about 5mm in diameter and 30mm in length. The Fermi surface of LaRh_2 was determined by the dHvA effect.

我们在超高真空条件下建造了区熔式射频炉。将稀土化合物锭置于船形铜炉床上，用水冷却。当这种晶锭通过射频工作线圈时，它部分熔化并生长为单晶。（1）首先在氩气气氛中通过三弧Chochralski提拉法生长CeRu_2Si_2单晶，并在1500 ℃、1 × 10 ~（-3）Pa的高真空下退火<-8>5小时。所得样品的残余电阻率比为250，表明晶体质量良好。利用这个高质量的样品，我们观测到了一个具有120m_0大回旋质量的超重载流子。(2)We用区熔法生长了LaRh_2单晶。区熔的扫描速度为5 mm/hr，获得的单晶锭直径约为5 mm，长度约为30 mm。LaRh_2的费米面由dHvA效应决定。

项目成果

K. Satoh, S. W. Yun, I. Umehara, Y. Onuki, S. Uji, T. Shimizu, H. Aoki: "de Haas-van Alphen Effect in UGe_2" J. Phys. Soc. Jpn.61. 1827-1828 (1992)

K. Satoh、S. W. Yun、I. Umehara、Y. Onuki、S. Uji、T. Shimizu、H. Aoki：“UGe_2 中的德哈斯-范阿尔芬效应”J. Phys。

H. Aoki, S. Uji, A. K. Albessard and Y. Onuki: "dHVA Effect Study of Metamagnetic Transition in CeRu_2Si_2" J. Phys. Soc. Jpn.

H. Aoki、S. Uji、A. K. Albessard 和 Y. Onuki：“CeRu_2Si_2 中变磁转变的 dHVA 效应研究”J. Phys。

H, Aoki, S. Uji A. K. Albessard and Y. Onuki: "Observation of Heavy Electrons in CeRu_2Si_2 via the dHVA Effect" J. Phys. Soc. Jpn.61. 3457-3461 (1992)

H、Aoki、S. Uji、A. K. Albessard 和 Y. Onuki：“通过 dHVA 效应观察 CeRu_2Si_2 中的重电子”J. Phys。

H.AOKI et al.: "dHVA Effect Study of Metamagnetic Transition in CeRu_2Si_2" J.Phys.Soc.Jpn.

H.AOKI 等人：“CeRu_2Si_2 中变磁转变的 dHVA 效应研究”J.Phys.Soc.Jpn。