Superconductivity in cubic and tetragonal phases of (La1-yMy)3S4 with M = Vacancy, Sc, Y, Ce, Lu, Th

K. Ikeda, A. Chiba, K. A. Gschneidner, Y. C.S. Yeh, B. J. Beaudry, N. Kobayashi, K. Noto

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2 Citations (Scopus)

Abstract

The measurements of the electrical resistivity and the low temperature heat capacity in the superconducting (La1-yMy)3S4 compounds with M = vacancy, Sc, Y, Ce, Lu, and Th were made in zero field and in magnetic fields up to 16 and 10 T, respectively. The optimum superconducting properties appear in the cubic La0.97Th0.03S1.333, which has ∼10% higher Tc and about a threefold higher Hc2(0) than the hypothetical values in the tetragonal LaS1.333. The relationship between Hc2(0) and Tc (i.e. Hc2(0) = C0Tc, where C0 = 1.96 and 1.32 T/K for the cubic and tetragonal phases, respectively ) is found in a series of La1-yMySx compounds. The high Hc2(0) values for the cubic compounds originate in the anomalously large values of the residual resistivity, which may reflect the instability of the cubic lattice.

Original languageEnglish
Pages (from-to)391-393
Number of pages3
JournalPhysica B+C
Volume135
Issue number1-3
DOIs
Publication statusPublished - 1985 Dec 2
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)

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