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Mössbauer study of the spin reorientation in pseudobinary alloy Hf0.82Ta0.18Fe2

Authors
Journal
Journal of Alloys and Compounds
0925-8388
Publisher
Elsevier
Publication Date
Volume
427
Identifiers
DOI: 10.1016/j.jallcom.2006.03.008
Keywords
  • Hf0.82Ta0.18Fe2
  • Laves Phase
  • Mössbauer Spectroscopy
  • Spin Reorientation
Disciplines
  • Physics

Abstract

Abstract Hf 1− x Ta x Fe 2 pseudobinary alloy with x = 0.18 was prepared. It was found to crystallize in C14 type Laves phase structure examined by X-ray diffraction (XRD). Mössbauer spectra at varied temperatures show there are two transition temperatures, one for paramagnetic (PM) to antiferromagnetic (AFM) state at about 330 K, and the other for AFM to ferromagnetic (FM) state at about 180 K. In the latter transition, spin reorientation is observed. The spin of Fe magnetic moment at 6 h is along c axis in AFM state while lie close to ab-plane in FM state. No magnetic interaction at 2 a site is found in AFM state but FM. The hyperfine field anisotropy at 6 h site in FM state is also analyzed.

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