Resonant ultrasound spectroscopy – a tool to probe magneto-elastic properties of ferromagnetic shape memory alloys

  • Oleg Heczko
  • Hanuš Seiner
  • Petr Sedlák
  • Jaromír Kopeček
  • Vít Kopecký
  • Michal Landa
Regular Article
Part of the following topical collections:
  1. Topical issue: New Trends in Magnetism and Magnetic Materials

Abstract

Resonant ultrasound spectroscopy (RUS) was used to investigate the changes of elastic properties induced by magnetic field in magnetic shape memory alloys Ni-Mn-Ga and Co-Ni-Al. In contrast to large magneto-elastic response of Ni2MnGa austenite, there is only very weak response of Co-Ni-Al. This indicates that the austenite phase of Ni-Mn-Ga can have a privileged position and this may be a reason for the existence of magnetic shape memory effect. In contrast to austenite, the magneto-elastic response in Ni-Mn-Ga martensite is very small with large damping due to existence of twin boundaries. The measurement showed that RUS can be a powerful method to probe magneto-elastic properties of shape memory alloys.

Keywords

Topical issue: New Trends in Magnetism and Magnetic Materials. Guest editors: Francesca Casoli, Massimo Solzi and Paola Tiberto 

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Oleg Heczko
    • 1
  • Hanuš Seiner
    • 2
  • Petr Sedlák
    • 2
  • Jaromír Kopeček
    • 1
  • Vít Kopecký
    • 1
  • Michal Landa
    • 2
  1. 1.Institute of Physics, Academy of Sciences of the Czech RepublicPrague 8Czech Republic
  2. 2.Institute of Thermomechanics, Academy of Sciences of the Czech RepublicPrague 8Czech Republic

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