Fine control of Curie temperature of magnetocaloric alloys La(Fe,Co,Si)13 using electrolytic hydriding

Guoa, L., Lovell, E., Tang, Q., Boldrin, D. C. , Tang, C. C., Day, S. J., Cohen, L. F. and Ryan, M. P. (2020) Fine control of Curie temperature of magnetocaloric alloys La(Fe,Co,Si)13 using electrolytic hydriding. Scripta Materialia, 175, pp. 33-37. (doi: 10.1016/j.scriptamat.2019.08.017)

Abstract

This work demonstrates precision control of hydrogen content in La(Fe,Co,Si)13Hδ for the development of environmentally friendly magnetocaloric-based cooling technologies, using an electrolytic hydriding technique. We show the Curie temperature, a critical parameter which directly governs the temperature window of effective cooling, can be varied easily and reproducibly in 1 K steps within the range 274 K to 402 K. Importantly, both partially (up to 10%) and fully hydrided compositions retain favorable entropy change values comparable to that of the base composition. Crucially, we show in these second-order phase transition compounds, partial hydriding is stable and not susceptible against phase separation.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Boldrin, Dr David
• Authors: Guoa, L., Lovell, E., Tang, Q., Boldrin, D. C., Tang, C. C., Day, S. J., Cohen, L. F., and Ryan, M. P.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Scripta Materialia
• Publisher: Elsevier
• ISSN: 1359-6462
• ISSN (Online): 1872-8456
• Published Online: 04 October 2020
• Copyright Holders: Copyright © 2020 Elsevier
• First Published: First published in Scripta Materialia 175:33-37
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher