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

The technique of differential calorimetry of materials in high magnetic fields was developed. The differential calorimeter on the base on Peltier elements was made for working in the fields of Bitter magnet (up to 14 T). Calorimetric studies were performed on Fe48Rh52 alloy with reverse magnetocaloric effect near the meta-magneto-structural phase transition. It is shown that the latent heat is reduced both in the forward and the reverse transformation with increasing of magnetic field.

 

1. Annaorazov M.P., Asatryan K.A., Myalikgulyev G., Nikitin S.A., Tishin A.M., Tyurin A.L. Alloys of the Fe-Rh system as a new class of working material for magnetic refrigerators // Cryogenics. 1992. V. 32. P. 867-872.
2. Kouvel J.C., Hartelius C.C. Anomalous magnetic moments and transformations in the ordered alloy FeRh // J. Appl. Phys. 1962. V.33. P. 1343-1344.
3. Plackowski T, Wang Y., Junod A.Specific heat and magnetocaloric effect measurements using commercial heat-flow sensors // Rev. Sci. Instrum. 2002. V.73. P. 2755-2765.
4. Stern-Taulats E., Planes A., Lloveras P., Barrio M., Tamarit JL., Pramanick S., Majumdar S., Frontera C., Manosa L. Barocaloric and magnetocaloric effects in Fe₄₉Rh₅₁// Physical Review B. 2014. V. 89.