Superconductivity in Sr(Pd 1-x Ni x ) 2 Ge 2

C. D. Yang, H. C. Hsu, W. Y. Tseng, H. C. Chen, H. C. Ku, M. N. Ou, Y. Y. Chen, Yung-Yuan Hsu

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Abstract

The systematic variations of lattice structure and superconducting transition temperature in Sr(Pd 1-x Ni x ) 2 Ge 2 are reported. The X-ray diffraction patterns can be labeled by tetragonal I4/mmm (no. 139) space group with only minor impurities, which indicates the substitution Ni into Pd sites is successful and formed pure phase. The tetragonal lattice parameter a decreases and c increases monotonically with Ni concentration x, while the unit cell volume decreases. A systematic, gradual change of superconducting transition temperature T c increases slightly to 3.2 K for very small Ni doping of x ∼ 0.1 then slowly decreases to 2.1 K for x = 0.5. Further investigation for SrNi 2 Ge 2 by low temperature resistivity indicated a T c,mid of 0.87 K suggesting that superconductivity exists through the whole Ni substitution levels.

Original languageEnglish
Article number012089
JournalJournal of Physics: Conference Series
Volume273
Issue number1
DOIs
Publication statusPublished - 2011 Jan 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Yang, C. D., Hsu, H. C., Tseng, W. Y., Chen, H. C., Ku, H. C., Ou, M. N., Chen, Y. Y., & Hsu, Y-Y. (2011). Superconductivity in Sr(Pd 1-x Ni x ) 2 Ge 2 Journal of Physics: Conference Series, 273(1), [012089]. https://doi.org/10.1088/1742-6596/273/1/012089