Chinese Physics B · 2010 · 20 citations · 23 references
Natural SciencesMaterials EngineeringMaterials ScienceEnergy MaterialsMagnetic MaterialsMaterials ThermodynamicsCurie TemperatureFerromagnetic MaterialsFerromagnetismMagnetism Of Inorganic CompoundsMagnetocaloric MaterialsPhase TransitionsEntropy ChangeHysteresisMagnetic EntropyMagnetic Entropy ChangeMagnetic RefrigerationMagnetocaloric EffectRefrigerant CapacitySecond-order Magnetic Transitions
We have studied the magnetic and magnetocaloric properties of the Er3Co compound, which undergoes ferromagnetic ordering below the Curie temperature TC = 13 K. It is found by fitting the isothermal magnetization curves that the Landau model is appropriate to describe the Er3Co compound. The giant magnetocaloric effect (MCE) without hysteresis loss around TC is found to result from the second-order ferromagnetic-to-paramagnetic transition. The maximal value of magnetic entropy change is 24.5 J/kgK with a refrigerant capacity (RC) value of 476 J/kg for a field change of 0–5 T. Large reversible MEC and RC indicate the potentiality of Er3Co as a candidate magnetic refrigerant at low temperatures.
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