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Hyperfine-interaction parameters and magnetic phase antiferromagnet–ferromagnet transition in Ce(Fe1–xSix)2

Authors
  • Vershinin, A. V.1
  • Naumov, S. P.1
  • Serikov, V. V.1
  • Kleinerman, N. M.1
  • Mushnikov, N. V.1
  • Rusakov, V. S.2
  • 1 Russian Academy of Sciences, Mikheev Institute of Metal Physics, Ural Branch, Ekaterinburg, 620990, Russia , Ekaterinburg (Russia)
  • 2 Lomonosov Moscow State University, Moscow, 119991, Russia , Moscow (Russia)
Type
Published Article
Journal
The Physics of Metals and Metallography
Publisher
Pleiades Publishing
Publication Date
Dec 15, 2016
Volume
117
Issue
12
Pages
1185–1191
Identifiers
DOI: 10.1134/S0031918X16120176
Source
Springer Nature
Keywords
License
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Abstract

Mössbauer spectroscopy study of Ce(Fe1–xSix)2 compounds with x = 0 and 0.07 was performed at different temperatures. Easy magnetization axis of the CeFe2 ferromagnet at 130 K was shown to be in the {110} plane and to deviate from the [001] axis by ∼10°. Upon cooling, the Ce(Fe0.93Si0.07)2 compound undergoes the ferromagnet–antiferromagnet phase transition in a temperature range of 120–125 K, which is accompanied by the reduction of the lattice symmetry. The Debye temperature of the Ce(Fe0.93Si0.07)2 compound was estimated using temperature dependences of the integral intensity of Mössbauer spectrum; it is TD ≈ 310 K. When analyzing the P(H) hyperfine field distributions P(H) derived from the Mössbauer spectra of Ce(Fe0.93Si0.07)2, it was found that in the cubic structure of this compound in the ferromagnetic state there occur local rhomboherdal distortions typical of the antiferromagnetic state.

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