Transition between antiferromagnetic and ferromagnetic states in itinerant-electron La(FexAl1-x)13 compounds

K. Irisawa, A. Fujita, K. Fukamichi, M. Yamada, H. Mitamura, T. Goto, K. Koyama

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27 Citations (Scopus)

Abstract

The transition between the antiferromagnetic (AF) and the ferromagnetic (F) states has been investigated with regard to the magnetovolume effect and the spin-fluctuation characteristics in La(FexAl1-x) 13 compounds. The volume V and amplitude of the local magnetic moment Mloc are different between the AF and F states. In the AF state, the field-induced first-order AF-F transition appears and the transition proceeds with two steps in higher Fe concentration regions. The complex temperature dependence of the AF-F transition field is explained by the contribution from both the magnetic and elastic energies caused by the significant temperature variation of amplitude of Mloc. For the two-step transitions, the spin-floplike transition and the increase in amplitude of Mloc occur at the first- and second-step transitions, respectively. In other words, both the localized moment and the itinerant-electron characteristics are concurrently observed.

Original languageEnglish
Article number214405
Pages (from-to)1-16
Number of pages16
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume70
Issue number21
DOIs
Publication statusPublished - 2004 Dec
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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