Abstract
Magnetocaloric effect (MCE) in pulsed magnetic fields up to 50 T was directly studied in alloy Fe49Rh51. An inverse MCE ΔT ≈ –8 K is observed at different initial temperatures around the metamagnetic phase transition upon field rising to 20 T; further growth of the field to 50 T leads to a decrease in the absolute adiabatic temperature change by nearly 1 K, which is due to the direct MCE and proves that the whole sample undergoes a transition into the ferromagnetic phase. Upon the field decrease, the maximal absolute value of the adiabatic temperature change of |ΔT| = 9.8 K was revealed at 6 T when the initial temperature is 310 K.
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ACKNOWLEDGMENTS
The authors acknowledge support from the High Magnetic Field Laboratory (HLD) at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR), a member of the European Magnetic Field Laboratory (EMFL).
Funding
The work is supported by the Russian Science Foundation (project no. 18-12-00415).
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Translated by S. Efimov
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Kamantsev, A.P., Amirov, A.A., Koshkid’ko, Y.S. et al. Magnetocaloric Effect in Alloy Fe49Rh51 in Pulsed Magnetic Fields up to 50 T. Phys. Solid State 62, 160–163 (2020). https://doi.org/10.1134/S1063783420010151
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DOI: https://doi.org/10.1134/S1063783420010151