Relaxation of magnetic clusters in Sr and Fe doped cobaltate perovskites

Z. Németh, Z. Klencsár, E. Kuzmann, Z. Homonnay, A. Vértes, J. M. Greneche, M. Bódogh

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Mössbauer study of La1∈-∈x Sr x 57Fe0.025Co0.975O3 (0.15 ≤∈x∈≤ 0.25) perovskites below their magnetic ordering temperature shows cooperative electronic and magnetic phase separation for all compositions investigated. It is shown that the increase of the Sr concentration results in a transition from superparamagnetism to long range ferromagnetism of Co clusters between x = 0.18 and 0.2. In-field Mössbauer measurements revealed the existence of frustrated magnetic interactions at x = 0.22.

Original languageEnglish
Pages (from-to)63-68
Number of pages6
JournalHyperfine Interactions
Volume184
Issue number1-3
DOIs
Publication statusPublished - Jun 1 2008

Keywords

  • Magnetic transitions
  • Mössbauer spectrometry
  • Spin glass
  • Superparamagnetism

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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