Phase-field simulations of magnetic field-induced strain in Ni 2MnGa ferromagnetic shape memory alloy

P. P. Wu, X. Q. Ma, J. X. Zhang, L. Q. Chen

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

The magnetization and magnetic field-induced strain behavior of the ferromagnetic shape memory alloy, Ni2MnGa, under constant compressive stress were studied using the phase-field method. Based on the evolving magnetic domain and martensitic structures, we analyzed the cycling effect, magnetization hysteresis, strain recoveries, and coupling between the domain wall and martensite twin boundaries. We compared the switching behavior of single variant and multivariant martensite structures. We observed three types of magnetic field-induced strain mechanisms, depending on the magnitude of the applied compressive stress. The study revealed that the martensite microstructure of the magnetic shape memory alloy plays an important role in magnetization and strain evolution during loading and unloading of an external magnetic field under different stress conditions. The results are compared with existing experimental observations.

Original languageEnglish (US)
Pages (from-to)2102-2116
Number of pages15
JournalPhilosophical Magazine
Volume91
Issue number16
DOIs
StatePublished - Jun 1 2011

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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