Superconductivity at 18 K in yttrium sesquicarbide system, Y2C3

被引：117

作者：

Amano, G ^{[1
]}

Akutagawa, S ^{[1
]}

Muranaka, T ^{[1
]}

Zenitani, Y ^{[1
]}

Akimitsu, J ^{[1
]}

机构：

[1] Aoyama Gakuin Univ, Dept Phys, Sagamihara, Kanagawa 2298558, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2004年 / 73卷 / 03期

关键词：

lanthanoid carbide; superconductivity; susceptibility; Y2C3;

D O I：

10.1143/JPSJ.73.530

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this study, we investigated superconductivity at 18 K in an yttrium sesquicarbide system. Y2C3, by a magnetization measurement, although this material with a maximum T-c of 11.5 K has already been investigated by Krupka et al. in J. Less-Common Met. 17 (1969) 91. The crystal structure Of Y2C3 is a body-centered cubic (Pu2C3-type) structure, and the lattice parameters are varied by heat treatment conditions. The magnetization (M-H) Curves Of this compound show a typical type-II superconducting behavior, and the lower critical field, H-cl (0), is 3.5 mT. The T-c value in this system is changed in the range from 15 K to 18 K, depending on sintering conditions. The sintering conditions in this work are different from those in a previous work by Krupka et al. We successfully synthesized a new high-T-c phase in Y2C3.

引用

页码：530 / 532

页数：3

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