Magnetocaloric and shape-memory properties in magnetic heusler alloys

Antoni Planes*, Lluís Mañosa, Xavier Moya, Jordi Marcos, Mehmet Acet, Thorsten Krenke, Seda Aksoy, Eberhard F. Wassermann

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

12 Citations (Scopus)

Abstract

In this paper, we discuss the magnetocaloric behavior of Ni-Mn-based Heusler alloys in relation to their shape-memory and superelastic properties. We show that the magnetocaloric effect in these materials originates from two different contributions: (i) the coupling that is related to a strong uniaxial magnetic anisotropy and takes place at the length scale of martensite variants and magnetic domains (extrinsic effect), and (ii) the intrinsic microscopic magnetostructural coupling. The first contribution is intimately related to the magnetically induced rearrangement of martensite variants (magnetic shape-memory) and controls the magnetocaloric effect at small applied fields, while the latter is dominant at higher fields and is essentially related to the possibility of magnetically inducing the martensitic transition (magnetic superelasticity). The possibility of inverse magnetocaloric effect associated with these two contributions is also considered.

Original languageEnglish
Pages (from-to)221-228
Number of pages8
JournalAdvanced Materials Research
Volume52
DOIs
Publication statusPublished - 2008
Externally publishedYes
EventInternational Conference on Ferromagnetic Shape Memory Alloys - Kolkata, India
Duration: 14 Nov 200716 Nov 2007

Keywords

  • Ferromagnetism
  • Heusler alloys
  • Magnetocaloric effect
  • Shape-memory alloys

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