Magnetocaloric effect in itinerant electron metamagnetic systems La(Fe{sub 1-x}Co{sub x}){sub 11.9}Si{sub 1.1}
Journal Article
·
· Journal of Applied Physics
- Department of Physics, Capital Normal University, Beijing 100037 (China) and Department of Physics, University of Hong Kong, Pokfulam Road, Hong Kong (China)
The NaZn{sub 13}-type compounds La(Fe{sub 1-x}Co{sub x}){sub 11.9}Si{sub 1.1} (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. T{sub C} is tunable from 243 to 301 K with Co doping from x=0.04 to 0.08. Great magnetic entropy change {delta}S in a wide temperature range from {approx}230 to {approx}320 K has been observed. The adiabatic temperature change {delta}T{sub ad} upon changing magnetic field was also directly measured. {delta}T{sub ad} of sample x=0.06 reaches {approx}2.4 K upon a field change from 0 to 1.1 T. The temperature hysteresis upon phase transition is small, {approx}1 K, for all samples. The influence of Co doping on itinerant electron metamagnetic transition and magnetic entropy change is discussed.
- OSTI ID:
- 20711664
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 10 Vol. 97; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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