(Pr0.75Ce0.25)-Fe-B hot-deformed magnets for cryogenic applications. (15th March 2021)

• Record Type: Journal Article
• Authors: Tang, Xin; Lai, Jiawei; Sepehri-Amin, H.; Ohkubo, T.; Hono, K.
• Is Part Of: Scripta materialia. Number 194(2021)
• Publication Date: 2021-03-15
• Subjects: Permanent magnet -- Cryogenic magnetic refrigeration -- Hot-deformed magnet -- Remanent magnetization; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.113648
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: We explored the possibility of Pr-Fe-B and (Pr0.75 Ce0.25 )-Fe-B based hot-deformed magnets as magnetic field source for cryogenic magnetic refrigeration. Thanks to the elimination of spin reorientation effect in the rare earth (RE)-Fe-B system, Pr-Fe-B based hot-deformed magnet shows a large remanence of µ0 M r = 1.75 T with a coercivity of 7.4 T at 20 K. To our surprise, (Pr0.75 Ce0.25 )-Fe-B based hot-deformed magnet shows even higher remanence of 1.76 T with a coercivity of 4.8 T at 20 K. The measured maximum energy product of the anisotropic (Pr0.75 Ce0.25 )-Fe-B hot-deformed magnets is 612 kJ/m 3 at 20 K, demonstrating their potential as a low-cost permanent magnet for cryogenic applications. Graphical abstract: Image, graphical abstract