Journal of Hebei University (Natural Science Edition) ›› 2019, Vol. 39 ›› Issue (6): 587-593.DOI: 10.3969/j.issn.1000-1565.2019.06.005

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First-principle study of magnetic shape memory effect of Mn2RhZ(Z=In, Sn, Sb)Heusler alloy

ZHANG Miao1, ZHANG Lianshui2   

  1. 1.College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China2.College of Physics Science and Technology, Hebei University, Baoding 071002, China
  • Received:2019-05-17 Online:2019-11-25 Published:2019-11-25

Abstract: The electronic structure and magnetic structure optimization on cubic austenitic Mn2RhZ(Z=In, Sn, Sb)alloy in Cu2MnAl and the Hg2CuTi type structures have been investigated by using first principle calculations. In the austenitic phase, the Mn2RhZ(Z=In, Sn, Sb)alloy of Hg2CuTi type structure is more stable. With the tetragonal distortion, the global energy minimum occurs at c/a=1.38, 1.29, 1.29. The total magnetic moments of Mn2RhZ(Z=In,Sn,Sb)mainly determined by the anti-parallel aligned Mn(A)and Mn(B)atoms spin moments. The magnetic moments of two Mn atoms in the Mn2RhSb alloy in the austenite phase exhibit anti-parallel coupling, while the Mn2RhZ(Z=In, Sn)in austenite and martensite phases and the Mn2RhSb alloy in martensite phase are ferrimagnetic. The Mn2RhZ(Z=In, Sn, Sb)alloys are potential materials with significant magnetic shape memory effect.

Key words: first principle calculations, martensitic transformations, magnetic shape memory

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