Journal of Applied Physics · 2005 · 106 citations · 6 references
Natural SciencesMaterials EngineeringMaterials ScienceInorganic ChemistryMagnetic MaterialsMaterials ChemistryFerromagnetismMagnetic CharacterizationMagnetic Properties Of SolidsMagnetism In SolidsMagnetism Of Inorganic CompoundsMagnetocaloric MaterialsAdiabatic Temperature ChangeEntropy ChangeEntropy Change In Magnetic MaterialsHysteresisMagnetic EntropyMagnetic Entropy ChangeMagnetocaloric EffectMetamagnetic Transitions
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 ΔS in a wide temperature range from ∼230 to ∼320K has been observed. The adiabatic temperature change ΔTad upon changing magnetic field was also directly measured. ΔTad of sample x=0.06 reaches ∼2.4K upon a field change from 0 to 1.1 T. The temperature hysteresis upon phase transition is small, ∼1K, for all samples. The influence of Co doping on itinerant electron metamagnetic transition and magnetic entropy change is discussed.
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Very large magnetic entropy change near room temperature in LaFe11.2Co0.7Si1.1
Fengxia Hu, Baogen Shen, Jirong Sun et al. · Applied Physics Letters · 2002 · 249 citations