Room Temperature Magnetocaloric Effect in Ni-Mn-In

P. A. Bhobe; K. R. Priolkar; A. K. Nigam

doi:10.1063/1.2823601

Room Temperature Magnetocaloric Effect in Ni-Mn-In

Materials Science 2009-11-13 v1

Authors: P. A. Bhobe , K. R. Priolkar , A. K. Nigam

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Abstract

We have studied the effect of magnetic field on a non-stoichiometric Heusler alloy Ni $_{50}$ Mn $_{35}$ In $_{15}$ that undergoes a martensitic as well as a magnetic transition near room temperature. Temperature dependent magnetization measurements demonstrate the influence of magnetic field on the structural phase transition temperature. From the study of magnetization as a function of applied field, we show the occurrence of inverse-magnetocaloric effect associated with this magneto-structural transition. The magnetic entropy change attains a value as high as 25 J/kg-K (at 5 T field) at room temperature as the alloy transforms from the austenitic to martensitic phase with a concomitant magnetic ordering.

Keywords

magnetocaloric effect magnetization magnetic structure

Cite

@article{arxiv.0711.2896,
  title  = {Room Temperature Magnetocaloric Effect in Ni-Mn-In},
  author = {P. A. Bhobe and K. R. Priolkar and A. K. Nigam},
  journal= {arXiv preprint arXiv:0711.2896},
  year   = {2009}
}

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