Evidence for superconductivity in SrTa{sub 2}S{sub 5} and metallic characteristics of SrNb{sub 2}S{sub 5}

Journal Article · Sun Feb 01 04:00:00 EST 1998 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1006/jssc.1997.7628· OSTI ID:642190

Kijima, Norihito; Takahashi, Masatomo; Matsumoto, Nobuhiro; Nagata, Shoichi ^[1]

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1. Muroran Inst. of Tech., Hokkaido (Japan). Dept. of Materials Science and Engineering

A strontium niobium sulfide, SrNb{sub 2}S{sub 5}, and a strontium tantalum sulfide, SrTa{sub 2}S{sub 5}, have been successfully synthesized by a sulfurization method using Cs{sub 2}. SrNb{sub 2}S{sub 54} and SrTa{sub 2}S{sub 5} have hexagonal structures with lattice constants of a = 3.361, c = 24.06 {angstrom} and a = 3.306, c = 24.26 {angstrom}, respectively. SrNb{sub 2}S{sub 5} shows metallic conductivity and temperature-independent susceptibility with an extremely small Curie-Weiss contribution at low temperatures. SrTa{sub 2}S{sub 5} exhibits a superconducting transition at 2.75K (midpoint). The superconducting transition temperature of SrTa{sub 2}S{sub 5} depends on the purity of specimens. The authors have verified that the high-purity specimen shows the superconducting transition with a much lower {Tc} than that of low-purity specimen.

• OSTI ID: 642190
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 2 Vol. 135; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
EXPERIMENTAL DATA
LATTICE PARAMETERS
MAGNETIC PROPERTIES
NIOBIUM SULFIDES
SAMPLE PREPARATION
STRONTIUM SULFIDES
SUPERCONDUCTIVITY
TANTALUM SULFIDES
X-RAY DIFFRACTION