Microstructure and magnetic properties of as-quenched cubic and tetragonal La(Fe1-xSix)13 compounds

K. Niitsu, S. Fujieda, A. Fujita, R. Kainuma

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The microstructure and magnetic properties of cubic- and tetragonal-La(Fe1xSix)13 compounds were systematically investigated. Obtained XRD patterns revealed that a semi-ordered tetragonal-La(Fe1xSix) 13 phase (termed the τ'2 phase in this work) appears due to quenching from the Si-rich concentration range of the cubic-La(Fe 1xSix)131) single phase region, whose tetragonality, namely the ratio of short and long axes, is lower than that of the known tetragonal Ce2Ni17Si 9-type La(Fe1xSix)132) phase. It was also found that the τ'2 phase has not only periodically configurated twin boundaries as a microstructural feature but also unique concentration dependence of magnetic properties, i.e., Curie temperature and spontaneous magnetization drastically decrease with increasing Si concentration.

Original languageEnglish
Pages (from-to)220-227
Number of pages8
JournalJournal of Alloys and Compounds
Volume578
DOIs
Publication statusPublished - 2013 Jan 1

Keywords

  • Intermetallics
  • Magnetocaloric
  • Microstructure
  • Order-disorder effects
  • Phase transitions
  • Rare earth alloys and compounds

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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