| Autor: |
Zhao-Jun Mo, Jun Shen, Gui-Feng Chen, Li-Qin Yan, Xinqi Zheng, Jian-Feng Wu, Cheng-Chun Tang, Ji-Rong sun, Bao-Gen Shen |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 2014, Vol. 115 Issue 17, p17A909-1-17A909-3, 3p |
| Abstrakt: |
The magnetic and magnetocaloric properties of TmNi1-xCuxAl (x =0, 0.1, 0.3, 0.5, 0.7, 0.9, 1) compounds have been investigated. With the substitution of Ni by Cu, the Tm-magnetic moment rotates its direction from basal plane to the c-axis and finally becomes canted antiferromagnetism structure with larger projected moments along the c-axis near Tord. Furthermore, large reversible magnetocaloric effects have been observed in TmNi1-xCuxAl compounds around Tord, with no thermal hysteresis and magnetic hysteresis loss. The values of -▵SM max and refrigerant capacity are greatly improved when the part of Ni was superseded by Cu. In particular, under the magnetic field change of 2 T, a large -▵SMmax of TmNi0.7Cu0.3Al (10.7 J/kg K) is almost twice that of TmNiAl (5.5 J/kg K) and 17.2 J/kg K for TmCuAl around 4 K. The present results indicate that TmNi1-xCuxAl (x⩾0.3) compounds could be considered as good candidate materials for low-temperature and low-field magnetic refrigerant. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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