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

Author

Listed:
  • Oleg Heczko
  • Hanuš Seiner
  • Petr Sedlák
  • Jaromír Kopeček
  • Vít Kopecký
  • Michal Landa

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 Ni 2 MnGa 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. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2013

Suggested Citation

  • Oleg Heczko & Hanuš Seiner & Petr Sedlák & Jaromír Kopeček & Vít Kopecký & Michal Landa, 2013. "Resonant ultrasound spectroscopy – a tool to probe magneto-elastic properties of ferromagnetic shape memory alloys," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 86(2), pages 1-5, February.
    • Handle: RePEc:spr:eurphb:v:86:y:2013:i:2:p:1-5:10.1140/epjb/e2012-30937-8
    DOI: 10.1140/epjb/e2012-30937-8
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