Phase transitions in ferromagnetic Ni2+xMn1-xGa alloys with regard for the modulation order parameter

V. D. Buchel'nikov, A. T. Zayak, A. N. Vasil'ev, D. L. Dalidovich, V. G. Shavrov, T. Takagi, V. V. Khovailo

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The phase diagram of ferromagnetic alloys Ni2+xMn1-xGa is reconstructed on the basis of temperature dependences of the resistance. It is seen from this diagram that for small x, structural transitions from the cubic to the tetragonal phase are preceded by structural transformations in the cubic phase. In the framework of the phenomenological Landau theory of phase transitions, phase diagrams of the structural and magnetic phase transitions in these alloys are analyzed with regard for the modulation order parameter. It is shown that premartensitic and postmartensitic phase transitions related to the appearance of the modulated structure can occur along with martensitic transformations. The strain and modulation order parameters substantially affect the magnetic phase transitions via the interaction with the magnetic order parameter.

Original languageEnglish
Pages (from-to)1010-1018
Number of pages9
JournalJournal of Experimental and Theoretical Physics
Volume92
Issue number6
DOIs
Publication statusPublished - 2001 Jun

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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