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Sequence of phase transformations leading to temperature hysteresis of the magnetic transition in Ni-Mn-Ga alloy

Friday (18.05.2018)
09:50 - 10:15
Part of:

The temperature dependencies of electric impedance and magnetic properties showed occurrence of temperature hysteresis of the magnetic transition between ferro- and paramagnetic phases in the Ni51.9Mn27.0Ga21.1 alloy, which undergoes martensitic transformation at about 400 K. The absence of the latent heat absorption and release as well as appearance of maxima of AC susceptibility in high constant magnetic fields confirms a second order of the magnetic transition. XRD measurements reveal that different sequences of phase transitions take place in this alloy on cooling and heating that results in temperature hysteresis of magnetic transition in the martensitic phase

Dr. Sergiy Konoplyuk
The Academie of Science of Ukraine
Additional Authors:
  • Prof. Dr. V.olodymyr Kokorin
    The National Academy of Sciences of Ukraine
  • Dr. Gregory Gerstein
    Leibniz Universität Hannover
  • Prof. Dr. Hans Jürgen Maier
    Leibniz Universität Hannover
  • Dr. Oleksandr Kolomiets
    Lviv Polytechnic National University
  • Dr. Stanislav Daniš
    Charles University
  • Dr. Martin Míšek
    The Czech Academy of Sciences