Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Gd(sub 90)Co(sub 2.5)Fe(sub 7.5) Alloy Displaying Enhanced magnetocaloric Properties



Virgil Provenzano, Robert D. Shull, G Kletetschka, Paul E. Stutzman


Because of its attractive magnetocaloric properties, gadolinium (Gd) metal is currently the refrigerant of choice in the development of near-room temperature magnetic cooling prototypes (refrigerators, heat pumps, and air conditioners). The overwhelming use of gadolinium as a refrigerant in magnetic cooling applications is because it exhibits a large magnetocaloric effect (MCE) peak around room temperature together with negligible magnetic hysteresis and a relatively large refrigeration capacity (RC). Although, research and development carried out during the past fifteen years or so has led to discovery of new metallic-based materials with very promising magnetocaloric properties, with initial results pointing to their potential of being better refrigerants than gadolinium, to date this potential has not materialized. Therefore, gadolinium still remains the benchmark refrigerant for near-room temperature magnetic refrigeration applications. In this paper we report on the discovery of a new gadolinium alloy that displays superior magnetocaloric properties to those of gadolinium. This new alloy was obtained by alloying gadolinium with relatively small amounts of cobalt and iron. In this paper we present a magnetically-derived entropy change, SM, MCE peak computed from magnetic data in addition to a thermally-derived temperature change, TAD, MCE peak from direct thermal measurements for both polycrystalline (bulk) gadolinium and the polycrystalline Gd-Co-Fe alloy. Consequently, direct comparison of their magnetocaloric properties can be made. Both the magnetic data-derived and thermal data-derived MCE data showed MCE peaks for the alloy that are taller and broader than the corresponding MCE peaks for polycrystalline gadolinium. In addition, .............
Nature Materials


Co-Fe-doped gadolinium, magnetocaloric properties, magnetization, magnetic susceptibility and anisotropy


Provenzano, V. , Shull, R. , Kletetschka, G. and Stutzman, P. (2015), Gd(sub 90)Co(sub 2.5)Fe(sub 7.5) Alloy Displaying Enhanced magnetocaloric Properties, Nature Materials (Accessed May 24, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created July 3, 2015, Updated February 19, 2017