Journal
APPLIED PHYSICS LETTERS
Volume 77, Issue 19, Pages 3072-3074Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1323993
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A large magnetic entropy change has been observed in an intermetallic compound LaFe10.6Si2.4. The maximum -DeltaS(M)approximate to3.2 J/kg K was found at its Curie temperature, similar to 242 K, upon a 2 T magnetic field change. Although the entropy change is slightly smaller than that of pure Gd metal, such Fe-rich compounds still appear to be very attractive candidates since (a) the raw materials are much cheaper than pure Gd metal; (b) the Curie temperature can be easily shifted by tuning the composition; (c) the materials are much more chemically stable than pure Gd metal. (C) 2000 American Institute of Physics. [S0003-6951(00)03345-3].
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