Journal
MRS COMMUNICATIONS
Volume 13, Issue 1, Pages 117-120Publisher
SPRINGER HEIDELBERG
DOI: 10.1557/s43579-023-00321-w
Keywords
Magnetocaloric effect; Ni-Cr thin films; Segregation; Magnetic properties; Nanoscale; Thin film; Sputtering
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From multicomponent high-entropy alloys (AlCoCrFeNi) to ternary alloys (CrFeNi) and binary alloys (NiCr), Cr doping plays a crucial role in modifying the magnetocaloric properties of the resulting alloys. The magnetocaloric effect (MCE) of Ni100-xCrx (x = 5, 10, 15 at.%) nanogranular thin films was investigated by varying the concentration of Cr, showing near room-temperature magnetic entropy change (- delta S-M = 0.08 J/kg K) and relative cooling power (RCP = 25 J/kg) at 10 at.% Cr. The MCE properties can be well predicted using a phenomenological model based on magnetization as a function of temperature, showing good correlation with experimentally measured magnetic isotherms.
From multicomponent high-entropy alloys (AlCoCrFeNi) through ternary alloys (CrFeNi) to binary (NiCr) alloys, Cr doping plays a critical role in altering the magnetocaloric properties of the resultant alloys. Magnetocaloric effect (MCE) of Ni100-xCrx (x = 5, 10, 15 at.%) nanogranular thin films were investigated by varying Cr concentration, which demonstrate near room-temperature magnetic entropy change (- delta S-M = 0.08 J/kg K) and relative cooling power (RCP = 25 J/kg) at 10 at.% Cr. The MCE properties are well predicted using a phenomenological model based on magnetization as a function of temperature, and they correlate well with experimentally measured magnetic isotherms.
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