Effect of external fields on the martensitic transformation in Ni-Mn based Heusler alloys


Moya X., Manosa L., Planes A., Aksoy Esinoğlu S. , Acet M., Wassermann E. F. , ...More

International Conference on Ferromagnetic Shape Memory Alloys, Kolkata, India, 14 - 16 November 2007, vol.52, pp.189-191 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 52
  • Doi Number: 10.4028/www.scientific.net/amr.52.189
  • City: Kolkata
  • Country: India
  • Page Numbers: pp.189-191
  • Keywords: Field-induced transformation, shape-memory alloys, ferromagnetism, Heusler alloys, SHAPE-MEMORY ALLOYS, MAGNETIC-FIELD, ENTROPY CHANGE, PRESSURE, TEMPERATURE, TRANSITIONS, NI2MNGA, SN

Abstract

In this paper, we discuss the possibility of inducing a martensitic transition by means of an applied magnetic field or hydrostatic pressure in Ni-Mn based Heusler shape memory alloys. We report on the shift of the martensitic transition temperatures with applied magnetic field and applied pressure and we show that it is possible to induce. the structural transformation in a Ni50Mn34In16, alloy by means of both external fields due to: (i) the low value of the entropy change and (ii) the large change of magnetization and volume, which occur at the martensitic transition.