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In-situ research martensitic transformation in Ni<sub>2.16</sub>Mn<sub>0.84</sub>Ga Неusler alloy in strong magnetic fields


E.T. Dilmieva – Post-graduate Student, Bauman MSTU. E-mail: A.P. Kamantsev – Post-graduate Student, Kotelnikov IRE RAS (Moscow) A.V. Mashirov – Trainee Researcher, Kotelnikov IRE RAS (Moscow) V.V. Koledov – Dr.Sc. (Phys.-Math.), Leading Researcher, Kotelnikov IRE RAS (Moscow)

Thermoelastic martensitic transformation in Ni2.16Mn0.84Ga alloy under the influence of a magnetic field and temperature is investi-gated by means of original installation (optical microscope). Different deposits to change of temperature of a sample under the influence of a magnetic field are shown: to Hcr – direct magnetocaloric effect (MCE) due to streamlining of magnetic spin, after Hcr – giant MCE (transition to a low-symmetric structural phase and streamlining of magnetic spin). The qualitative explanation of observed effects is offered.


  1. Gottschall T., Skokov K.P., Frincu B., Gutfleisch O. Large reversible magnetocaloric effect in Ni-Mn-In-Co // Applied Physics Letters 106. 021901 (2015); doi: 10.1063/1.4905371.
  2. Kihara T., Katakura I., Tokunaga M., Matsuo A., Kawaguchi K., Kondo A., Kindo K., Ito W., Xu X., Kainuma R.Optical imaging and magnetocaloric effect measurements in pulsed high magnetic fields and their application to Ni–Co–Mn–In Heusler alloy // Journal of Alloys and Compounds. V. 577. S. 1. 15 Nov. 2013. P. S722–S725. doi:10.1016/j.jallcom.2012.02.018.


June 24, 2020
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