| Autor: |
Hu, F. X., Gao, J., Qian, X. L., Ilyn, Max, Tishin, A. M., Sun, J. R., Shen, B. G. |
| Zdroj: |
Journal of Applied Physics; 5/15/2005, Vol. 97 Issue 10, p10M303-1-10M303-3, 3p, 4 Graphs |
| Abstrakt: |
The NaZn13-type compounds La(Fe1-xCox)11.9Si1.1 (x=0.04, 0.06, 0.08) were successfully synthesized, in which the Si content is the limit that can be reached by arc-melting technique. TC is tunable from 243 to 301 K with Co doping from x=0.04 to 0.08. Great magnetic entropy change DS in a wide temperature range from ∼230 to ∼320 K has been observed. The adiabatic temperature change ΔTad upon changing magnetic field was also directly measured. ΔTad of sample x=0.06 reaches ∼2.4 K upon a field change from 0 to 1.1 T. The temperature hysteresis upon phase transition is small, ∼1 K, for all samples. The influence of Co doping on itinerant electron metamagnetic transition and magnetic entropy change is discussed. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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