Spin correlations in (Mn,Fe)2(P,Si) magnetocaloric compounds above Curie temperature

Xue-fei Miao, Luana Caron, Paul Gubbens, A Yaouanc, P Dalmas de Réotier, H. Luetkens, A Amato, Niels van Dijk, Ekkes Brück

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

The longitudinal-field muon-spin relaxation (LF-μSR) technique was employed to study the spin correlations in (Mn,Fe)2(P,Si) compounds above the ferromagnetic transition temperature (TC). The (Mn,Fe)2(P,Si) compound under study is found to show itinerant magnetism. The standard deviation of the magnetic field distribution of electronic origin increases with a decrease in temperature, which is attributed to the development of spin correlations. The anomalously low magnetic fluctuation rate is suggested to be another signature of the spin correlations. The development of pronounced magnetic fluctuations is in agreement with the observed deviation of the paramagnetic susceptibility from Curie–Weiss behavior. Our study sheds light on the magneto-elastic transition and the mixed magnetism in (Mn,Fe)2(P,Si) compounds.
Original languageEnglish
Pages (from-to)147-151
JournalJournal of Science: Advanced Materials and Devices
Volume1
Issue number2
DOIs
Publication statusPublished - 21 Jun 2016

Keywords

  • Magnetocaloric effect
  • Spin correlations
  • Muon-spin relaxation
  • Spin dynamics

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