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J. Phys. Soc. Jpn. 81 (2012) 023702 (4 pages)  |Previous Article| |Next Article|  |Table of Contents|
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Superconductivity in Pseudo-Binary Silicide SrNixSi2-x with AlB2-Type Structure

Sunseng Pyon1,2, Kazutaka Kudo1,2, and Minoru Nohara1,2

1Department of Physics, Faculty of Science, Okayama University, Okayama 700-8530, Japan
2Transformative Research-Project on Iron Pnictides (TRIP), Japan Science and Technology Agency (JST), Chiyoda, Tokyo 102-0075, Japan

(Received October 21, 2011; Accepted November 22, 2011; Published January 5, 2012)

We demonstrate the emergence of superconductivity in pseudo-binary silicide SrNixSi2-x. The compound exhibits a structural phase transition from the cubic SrSi2-type structure (P4132) to the hexagonal AlB2-type structure (P6/mmm) upon substituting Ni for Si at approximately x=0.1. The hexagonal structure is stabilized in the range of 0.1<x<0.7. The superconducting phase appears in the vicinity of the structural phase boundary. Ni acts as a nonmagnetic dopant, as confirmed by the Pauli paramagnetic behavior. ©2012 The Physical Society of Japan

URL: http://jpsj.ipap.jp/link?JPSJ/81/023702/
DOI: 10.1143/JPSJ.81.023702


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