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The application of fiber-optical temperature sensor for measuring of the magnetocaloric effect in pulsed magnetic fields

Keywords:

A.P. Kamantsev – Junior Research Scientist, Kotelnikov IRE RAS (Moscow) E-mail: kama@cplire.ru A.V. Mashirov – Research Scientist, Kotelnikov IRE RAS (Moscow) V.V. Koledov – Dr.Sc. (Phys.-Math.), Leading Research Scientist, Kotelnikov IRE RAS (Moscow) L.N. Butvina – Ph.D. (Phys.-Math.), Senior Research Scientist, Fiber Optics Research Center of RAS


We present a new technique for experimental study of kinetics of phase transitions (PTs) and direct measurement of the magnetocaloric effect (MCE) in pulsed magnetic fields by using the fast response temperature probe with infrared fiber optical (IRFO) sensor. As demonstration of the new technique, the results are presented of MCE measurements for Gd near Curie point: ΔTad = 21.3 K under pulsed magnetic field µ0H = 12.7 T; and inverse MCE for Fe48Rh52 sample at initial temperature 305.1 K: ΔTad = 4,5 K under pulsed magnetic field µ0H = 8.5 T. The energy losses on magnetization near the 1st order PT were calculated from direct measurements for Fe48Rh52 sample: W = 45 J/kg.
References:

 

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