Applied Physics Letters · 2009 · 111 citations · 25 references
Magnetic PropertiesEngineeringMagnetic ResonanceMagnetocaloric EffectMagnetic Entropy ChangeMagnetic MaterialsMagnetoresistanceMagnetismMagnetic RefrigerationErga CompoundMaterials ScienceIntermetallic Compound ErgaPhysicsMagnetic MaterialSpintronicsFerromagnetismMolecule-based MagnetNatural SciencesApplied PhysicsCondensed Matter PhysicsSuccessive Magnetic TransitionsMagnetic PropertyCandidate Magnetic Refrigerant
Intermetallic compound ErGa exhibits two successive magnetic transitions: spin-reorientation transition at TSR=15 K and ferromagnetic-paramagnetic transition at TC=30 K. Both transitions contribute greatly to the magnetic entropy change (ΔSM), each yielding a significant peak on their ΔSM-T curve and thus a considerable value of refrigerant capacity (RC) without hysteresis loss. For a magnetic field change of 5 T, the maximal values of −ΔSM are 21.3 J/kg K at TC and 16.5 J/kg K at TSR, with an RC value of 494 J/kg. Large reversible magnetocaloric effect and RC indicate the potentiality of ErGa as a candidate magnetic refrigerant at low temperatures.
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