Nickel-based phosphide superconductor with infinite-layer structure, BaNi2P2

Details Nickel-based phosphide superconductor with infinite-layer structure, BaNi2P2 Nickel-based phosphide superconductor with infinite-layer structure, BaNi2P2

2008-05-28

arxiv.org/abs/0805.4305v1

Solid State Comm. 147, 111 (2008)

Physics

Condensed Matter

Superconductivity

9 pages, 4 figures, Solid State Communications, in press. Received 4 March 2008. Accepted 2 May 2008. Available online 14 May

Scientific paper

10.1016/j.ssc.2008.05.010

Analogous to cuprate high-Tc superconductors, a NiP-based compound system has several crystals in which the Ni-P layers have different stacking structures. Herein, the properties of BaNi2P2 are reported. BaNi2P2 has an infinite-layer structure, and shows a superconducting transition at ~3 K. Moreover, it exhibits metallic conduction and Pauli paramagnetism in the temperature range of 4-300 K. Below 3 K, the resistivity sharply drops to zero, and the magnetic susceptibility becomes negative, while the volume fraction of the superconducting phase estimated from the diamagnetic susceptibility reaches ~100 vol.% at 1.9 K. These observations substantiate that BaNi2P2 is a bulk superconductor.

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