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Erschienen in:
19.06.2021 | Original Research Article
Magnetocaloric and Scaling Behavior of Gd at High Magnetic Fields up to 140 kOe
Erschienen in: Journal of Electronic Materials | Ausgabe 9/2021
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Abstract
We have studied the impact of high fields (up to 140 kOe) on the magnetic and magnetocaloric properties of bulk Gd metal around the Curie temperature (TC). The results indicated that high field application above 20 kOe remarkably enhances TC and the width of the phase transition. The maximum magnetic entropy change (ΔSmax), relative cooling power (RCP), and the full width at half maximum (FWHM) of a temperature-dependent magnetic entropy change (|ΔSm|) curve (δTFWHM) also increase with increasing the field H. With H = 140 kOe, Gd at TC shows the largest |ΔSmax| and δTFWHM values of ~17.5 J/kg K and 120.4 K, respectively, corresponding to an extremely large RCP value of ~2112 J/kg. Analyzing the M(H) and |∆Sm(H)| data and a magnetic-order-related parameter, N(T, H), we have also found that Gd exhibits a second-order phase transition and short-range magnetic order, in accordance with previous critical behavior studies.