Applied Physics Letters · 2012 · 71 citations · 12 references
Natural SciencesMaterials EngineeringMaterials ScienceInorganic ChemistryMagnetic MaterialsMaterials PhysicsMagnetic CharacterizationMagnetic OxidesMagnetic Properties Of SolidsMagnetism In SolidsMagnetocaloric MaterialsPhase TransitionsEntropy ChangeEntropy Change In Magnetic MaterialsMagnetic EntropyMagnetic Entropy ChangeMagnetic Refrigeration MaterialsMagnetocaloric EffectStrain Effects On Magnetic PropertiesTemperature-dependent Magnetization
We report the magnetic and magnetocaloric properties of Dy1−xHoxMnO3 (0 ≤ x ≤ 1). Large entropy change of 12.5 J/kg K and refrigeration capacity of 312 J/kg at 7 T for HoMnO3 is calculated based on isothermal magnetization measurements. The peak temperature of magnetic entropy change for all samples keeps the same 10.5 K, indicating that Ho3+ doping only affects the value of magnetic entropy. An unambiguous intrinsic structural transition near 7 K is first observed by strain measurement, which is believed as the origin of magnetic symmetry transition of Dy1−xHoxMnO3 and induces the magnetocaloric effect with the cooperation interaction between Dy3+/Ho3+and Mn3+ spins.
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Natural Sciences, Materials Engineering, Materials Science +14