BiFeO3 Layer Thicknesses Effect on Magnetocaloric Effect in BiFeO3|La0.7Sr0.3MnO3 Thin Films
Mahmoud A. Hamad, O. M. Hemeda, Hatem R. Alamri, Mohamed E. Harb, Ashraf M. Mohamed
Abstract
The magnetocaloric effect (MCE) of BiFeO3 (BFO)|La0.7Sr0.3MnO3 (LSMO) thin films was investigated via phenomenological model. It is revealed that the values of magnetic entropy change, temperature range covering MCE, change of specific heat, and relative cooling power of BFO|LSMO films decrease dramatically with an increase of BFO. The simulation shows furthermore that these BFO|LSMO films have prospective importance in magnetic refrigerants over a wide temperature range, including cryogenic and room temperatures. The MCE parameters of BFO|LSMO films are significantly larger and comparable with some MCE ones of magnetic materials in previous works.
Topics & Concepts
Magnetic refrigerationMaterials scienceRefrigerantThin filmAtmospheric temperature rangeCurie temperaturePhenomenological modelCondensed matter physicsMagnetic fieldMagnetizationNanotechnologyThermodynamicsFerromagnetismHeat exchangerQuantum mechanicsPhysicsMagnetic and transport properties of perovskites and related materialsMultiferroics and related materialsAdvanced Condensed Matter Physics