Suppression of the enhanced paramagnetic thermal expansion of YMn2 by Fe substitutions

I. S. Dubenko, E. Gratz, A. Lindbaum, A. S. Markosyan, S. A. Markossian, V. E. Rodimin, G. Wiesinger

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The thermal expansion coefficient α of YMn2 just above its Néel temperature (TN = 90 K) is about 45 × 10-6 K-1, it takes a value of 53 × 10-6 K-1 at room temperature and passes through a maximum around 350 K. This unusual behaviour of α(T) and the higher value (if compared with other known spin fluctuation systems such as YCo2) has been attributed to electronic instabilities of the Mn ions. In the present investigation it is shown that - when changing the environment of an individual Mn ion by substituting Mn by Fe - α decreases very quickly with increasing Fe content. This has been considered as a proof that the electronic instabilities of the Mn ions depend very sensitively on the surroundings.

Original languageEnglish
Pages (from-to)571-572
Number of pages2
JournalJournal of Magnetism and Magnetic Materials
Volume177-181
Issue numberPART 1
DOIs
Publication statusPublished - Jan 1998
Externally publishedYes

Keywords

  • Manganese compounds
  • Spin fluctuations
  • Thermal expansion

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