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|Title:||Cs2NaAl1-xCrxF6: A family of compounds presenting magnetocaloric effect|
|Author:||Pedro, S. S.|
Tedesco, J. C. G.
Gomes, A. M.
Pires, M. J. M.
Sosman, L. P.
Mansanares, A. M.
Reis, M. S.
Bordallo, H. N.
|Abstract:||In this paper we explore the magnetocaloric effect (MCE) of chromium-doped elpasolite Cs2NaAl1-x,CrxF6 (x = 0.01 and 0.62) single crystals. Magnetization and heat capacity data show the magnetocaloric potentials to be comparable to those of garnets, perovskites, and other fluorides, producing magnetic entropy changes of 0.5 J/kg K (x = 0.01) and 11 J/kg K (x = 0.62), and corresponding adiabatic temperature changes of 4 and 8 K, respectively. These values are for a magnetic field change of 50 kOe at a temperature around 3 K. A clear Schottky anomaly below 10 K, which becomes more apparent when an external magnetic field is applied, was observed and related to the splitting of the Cr3+ energy levels. These results hint at a new family of materials with potential wide use in cryorefrigeration.|
Dispositivos supercondutores de interferência quântica
Superconducting quantum interference devices
|Editor:||American Physical Society|
|Appears in Collections:||IFGW - Artigos e Outros Documentos|
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