Forced magnetostriction of ferromagnetic Heusler alloy Ni2MnGa at the Curie temperature

T. Sakon, Y. Hayashi, N. Fujimoto, T. Kanomata, H. Nojiri, Y. Adachi

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6 Citations (Scopus)

Abstract

An investigation on the relationship between magnetostriction and magnetization by means of the self-consistent renormalization (SCR) theory of an itinerant ferromagnet was performed for Ni2MnGa alloy. The magnetization results at the Curie temperature TC suggest that the critical index δ of H - Mδ is 4.7-5.0, and this confirms Takahashi's spin fluctuation theory and the result of Nishihara et al. As a result, at TC, the relation between magnetostriction and M2 deviates from proportionality and the magnetostriction is proportional to M4. At TC, the plot of ΔL/L vs M4 crossed the point of origin. This result is in accordance with Takahashi's spin fluctuation theory.

Original languageEnglish
Article number213902
JournalJournal of Applied Physics
Volume123
Issue number21
DOIs
Publication statusPublished - 2018 Jun 7

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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