Anisotropic magnetization and resistivity of single crystalline RNi1-xBi2 +/- y (R = La-Nd, Sm, Gd-Dy)

TitleAnisotropic magnetization and resistivity of single crystalline RNi1-xBi2 +/- y (R = La-Nd, Sm, Gd-Dy)
Publication TypeJournal Article
Year of Publication2013
AuthorsLin X, Straszheim WE, Bud'ko SL, Canfield PC
Journal TitleJournal of Alloys and Compounds
Volume554
Pages304-311
Date Published03
Type of ArticleArticle
ISBN Number0925-8388
Accession NumberWOS:000314642200049
Keywordslu, magnetization, rare-earth compounds, resistivity, series, single crystals
Abstract

We present a detailed study of RNi1-xBi2+/-y (R = La-Nd, Sm, Gd-Dy) single crystals by measurements of stoichiometry and temperature dependent magnetic susceptibility, magnetization, and electrical resistivity. This series forms with partial Ni occupancy, 0.72 <= (1-x) <= 0.84, as well as a variable Bi occupancy, 1.76 <= (2+/-y) <= 2.14. For R = Ce-Nd, Gd-Dy, the RNi1-xBi2+/-y compounds show local-moment like behavior and order antiferromagnetically at low temperatures. Determination of anisotropies as well as antiferromagnetic ordering temperatures for RNi1-xBi2+/-y (R = Ce-Nd, Sm, Gd-Dy) have been made. Crystalline samples from this family exhibit minority, second phase superconductivity at low temperatures, which can be associated with Ni-Bi and Bi contamination. No evidence of bulk superconductivity has been observed. (C) 2012 Elsevier B.V. All rights reserved.

URL<Go to ISI>://WOS:000314642200049
DOI10.1016/j.jallcom.2012.11.138