Magnetic properties and large magnetic-field-induced strains in off-stoichiometric Ni-Mn-Al Heusler alloys

Asaya Fujita, K. Fukamichi, F. Gejima, R. Kainuma, K. Ishida

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194 Citations (Scopus)

Abstract

Magnetic properties and magnetic-field-induced strains (MFIS) have been investigated for off-stoichiometric Ni-Mn-Al Heusler alloys with an ordered L21 structure. A clear martensitic transformation in Ni53Mn2SAl22 alloy was revealed below the Curie temperature. In the polycrystalline specimen, an irreversible relative change due to the MFIS was confirmed between the martensite start and finish temperatures Ms and Mf, and a maximum relative length change ΔL/L|7T of about - 100 ppm was observed at just above Mf. On the other hand, a large irreversible relative length change of about 1000 ppm has been demonstrated in the magnetic field of 7 T for a single crystal cut from the polycrystalline specimen. A delay of the response of strains against the magnetic field was also confirmed.

Original languageEnglish
Pages (from-to)3054-3056
Number of pages3
JournalApplied Physics Letters
Volume77
Issue number19
DOIs
Publication statusPublished - 2000 Nov 6

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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