Dependence of the inverse magnetocaloric effect on the field-change rate in Mn3GaC and its relationship to the kinetics of the phase transition


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Scheibel F., Gottschall T., Skokov K., Gutfleisch O., Ghorbani-Zavareh M., Skourski Y., et al.

JOURNAL OF APPLIED PHYSICS, cilt.117, 2015 (SCI İndekslerine Giren Dergi)

  • Cilt numarası: 117 Konu: 23
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1063/1.4922722
  • Dergi Adı: JOURNAL OF APPLIED PHYSICS

Özet

We study the dependence of the magnetocaloric effect on the magnetic field-change-rate the first order magnetostructural transition in Mn3GaC by measuring the adiabatic temperature change Delta T at three different time scales: 11mTs(-1), 700mTs(-1), and similar to 1000Ts(-1). We find that the maximum adiabatic temperature-change of about 5 K is reached in the 11mTs(-1) and 700mTs(-1) rates, whereas for the similar to 1000Ts(-1)-rate the transition lags the change in the magnetic field so that the maximum adiabatic temperature-change is not attained. (C) 2015 AIP Publishing LLC.