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

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

JOURNAL OF APPLIED PHYSICS, cilt.103, sa.7, 2008 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 103 Sayı: 7
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1063/1.2830560
  • Dergi Adı: JOURNAL OF APPLIED PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • İstanbul Teknik Üniversitesi Adresli: Hayır

Özet

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.