Superconductivity at 18 K in yttrium sesquicarbide system, Y 2C3

Gaku Amano, Satoshi Akutagawa, Takahiro Muranaka, Yuji Zenitani, Jun Akimitsu

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Abstract

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 Tc 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, Hc1(0), is 3.5 mT. The Tc 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-Tc phase in Y2C3.

Original languageEnglish
Pages (from-to)530-532
Number of pages3
JournalJournal of the Physical Society of Japan
Volume73
Issue number3
DOIs
Publication statusPublished - Mar 2004
Externally publishedYes

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Keywords

  • Lanthanoid carbide
  • Superconductivity
  • Susceptibility
  • YC

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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