Jerky magnetic noises generated by cyclic deformation of martensite in Ni2MnGa single crystalline shape memory alloys

Lajos Daróczi, Szilvia Gyöngyösi, László Z. Tóth, Sándor Szabó, Dezso L. Beke

Research output: Article

5 Citations (Scopus)

Abstract

It is shown that during periodic deformation of martensitic Ni2MnGa single crystalline alloy jerky magnetic noises are emitted. Above a threshold limit in the deformation amplitude, the noise energy per deformation cycle showed increasing tendency with increasing deformation. Energy and amplitude probability distributions of the noise were characterized by power law functions. The energy exponents were independent of the deformation amplitude in the investigated range. The decrease of the noise energy as well as power exponents with increasing magnetic field was interpreted by the decrease of the multiplicity of the martensite variants.

Original languageEnglish
Article number041908
JournalApplied Physics Letters
Volume106
Issue number4
DOIs
Publication statusPublished - jan. 26 2015

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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