Phase transitions in NdNiPb and Nd(5)NiPb(3)


Goruganti V. , RATHNAYAKA K. D. D. , ROSS J. H. , OENER Y.

JOURNAL OF APPLIED PHYSICS, vol.103, no.7, 2008 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 103 Issue: 7
  • Publication Date: 2008
  • Doi Number: 10.1063/1.2830560
  • Title of Journal : JOURNAL OF APPLIED PHYSICS

Abstract

We report magnetic and thermodynamic measurements for NdNiPb and Nd(5)NiPb(3). High-temperature Curie-Weiss fits yield effective moments per Nd of 3.59 mu(B) for NdNiPb and 3.70 mu(B) for Nd(5)NiPb(3). These are close to the Nd(3+) ionic moment, 3.62 mu(B), showing that Ni is nonmagnetic in both cases. For NdNiPb a peak seen in both the magnetization and specific heat at 3.5 K indicates an antiferromagnetic transition at that temperature. Specific heat measurements show this transition to be formed from crystal-field-split Nd magnetic levels, and a fit yields values for crystal field splitting. Nd(5)NiPb(3) exhibits two magnetic transitions, an antiferromagnetic transition at 42 K, and an apparently weak-ferromagnetic canting transition at 8 K. These are confirmed by specific heat measurements. M-H curves show metamagnetism at temperatures between the two magnetic transitions. (c) 2008 American Institute of Physics.