Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 386, Issue -, Pages 37-43Publisher
ELSEVIER
DOI: 10.1016/j.jmmm.2015.03.017
Keywords
Intermetallic; Spin glasses; Anisotropy; Entropy
Funding
- Department of Atomic Energy (DAE), Board of Research in Nuclear Sciences (BRNS), Govt. of India [2010/20/37P/BRNS/2513]
- BRNS
- National Scholarship Programme of the Slovak Republic the Slovak Grant Agency [VEGA 2/0007/09]
- CLTP as the Centre of Excellence of the Slovak Academy of Sciences and P.J. Safarik University
- Slovak National Scholarship Programme of the Slovak Republic
- Indo-Swiss Joint Research Programme
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Single crystals of tetragonal RCuGa3 (R = La, Pr, Nd and Gd), with BaNiSn3 type structure (space group mm), have been grown by high temperature solution growth technique using Ga as flux. Their magnetic properties were determined by heat capacity and the measurement of magnetization and electrical resistivity along [100] and [001] directions. Except LaCuGa3, the compounds order magnetically. PrCuGa3 undergoes a ferromagnetic transition with Curie temperature of 4.6 K. NdCuGa3 shows a bulk magnetic transition at 3.3 K. The data on GdCuGa3 indicate combined characteristics of spin glass and anti-ferromagnetic behavior at low temperatures. From the Schottky heat capacity data the crystal electric field level energy spectra have been determined. Further we have performed temperature dependent measurements of electron spin resonance (ESR) on GdCuGa3 between 11 K and room temperature. The ESR data indicate an enhancement of magnetic fluctuations associated with spin reorientation and both homogeneous and inhomogeneous thermal broadening of the linewidth. (C) 2015 Elsevier B.V. All rights reserved.
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