Determination of the magnetic ground state in the martensite phase of Ni-Mn-Z (Z = In, Sn and Sb) off-stoichiometric Heusler alloys by nonlinear AC susceptibility

Rie Umetsu, A. Fujita, W. Ito, T. Kanomata, Ryosuke Kainuma

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29 Citations (Scopus)

Abstract

DC and AC magnetic measurements were carried out to clarify the difference in the magnetic ground state depending on the kinds of Z element used in the martensite phase in Ni-Mn-Z (Z = In, Sn and Sb) off-stoichiometric Heusler alloys. Magnetic field cooling effects were observed in the DC thermomagnetization curves in the low temperature regions, and a frequency dependence on AC susceptibility was also observed in both real and imaginary parts of the susceptibility. Negative divergence was clearly observed in nonlinear AC susceptibility only for the Ni50Mn40Sb 10 alloy, suggesting that the magnetic feature of its ground state is the spin-glass state. The magnetic ground state of the martensite phase in these alloys would relate to the magnetic configuration of the Mn atoms in the ferromagnetic austenite phase.

Original languageEnglish
Article number326001
JournalJournal of Physics Condensed Matter
Volume23
Issue number32
DOIs
Publication statusPublished - 2011 Aug 17

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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