التفاصيل البيبلوغرافية
| العنوان: |
Cs2NaAl1-xCrxF6: A family of compounds presenting magnetocaloric effect. |
| المؤلفون: |
Pedro, S. S.1,2, Tedesco, J. C. G.3, Yokaichiya, F.4, Brandão, P.5, Gomes, A. M.6, Landsgesell, S.7, Pires, M. J. M.8, Sosman, L. P.1, Mansanares, A. M.9, Reis, M. S.1, Bordallo, H. N.3 |
| المصدر: |
Physical Review B: Condensed Matter & Materials Physics. Aug2014, Vol. 90 Issue 6, p064407-1-064407-6. 6p. |
| مصطلحات موضوعية: |
*MAGNETOCALORIC effects, *MAGNETIC field effects, *MAGNETIC cooling, *CONDENSED matter, *CONDENSED matter physics |
| مستخلص: |
In this paper we explore the magnetocaloric effect (MCE) of chromium-doped elpasolite Cs2NaAl1-xCrxF6 (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. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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