Journal
JOURNAL OF SOLID STATE CHEMISTRY
Volume 181, Issue 8, Pages 2117-2120Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2008.04.033
Keywords
LaNiOAs; layered compound; superconductor
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Rietveld analysis of the powder X-ray diffraction of a new layered oxyarsenide, LaNiOAs, which was synthesized by solid-state reactions, revealed that LaNiOAs belongs to the tetragonal ZrCuSiAs-type structure (P4/nmm) and is composed of alternating stacks of La-O and Ni-As layers. The electrical and magnetic measurements demonstrated that LaNiOAs exhibits a superconducting transition at 2.4 K, and above this, LaNiOAs shows metallic conduction and Pauli paramagnetism. The diamagnetic susceptibility measured at 1.8 K corresponded to similar to 20% of perfect diamagnetic susceptibility, substantiating that LaNiOAs is a bulk superconductor. (C) 2008 Elsevier Inc. All rights reserved.
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