Article ID Journal Published Year Pages File Type
5490063 Journal of Magnetism and Magnetic Materials 2017 14 Pages PDF
Abstract
The magnetic and magnetocaloric properties of amorphous and crystalline Tb0.67Au0.33 were compared. Amorphous Tb0.67Au0.33 alloy exhibits a spin glass state with a prevailing ferromagnetic behavior with a Curie temperature of 130 K, while the crystalline alloy presents an antiferromagnetic behavior with a Néel temperature of 42 K. Arrott plots show that the amorphous alloy presents a second order magnetic transition while the crystalline state exhibits a field induced a metamagnetic transition. Under magnetic field change of 20 kOe, the maximum magnetic entropy changes were found to be 1.38 and 2.03 J/kg.K, with corresponding relative cooling power of 153 and 40 J/kg for the amorphous and crystalline Tb0.67Au0.33 alloys, respectively.
Related Topics
Physical Sciences and Engineering Physics and Astronomy Condensed Matter Physics
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