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PUBLICATIONS

Peak Magnetocaloric Effects in Al-Gd-Fe Alloys

Published

Author(s)

Virgil Provenzano, Alexander J. Shapiro, T T. King, E R. Canavan, P Shirron, M J. DiPirro, Robert D. Shull

Abstract

The magnetocaloric properties of several AlxGdyFez (with x+y+z=100) ternary alloys have been determined between 2-300 K. Three distinct peaks in the magnetic entropy change Sm vs T were found: a low temperature peak (near 10 K), an intermediate temperature peak (80-160 K) and a higher temperature peak (210-280 K). The low temperature peak coincides with a field-induced antiferromagnetic-to-ferromagnetic (AF/FM) transition; the intermediate and high temperature peaks are associated with other magnetic transitions. In fact, above 60 K these alloys exhibited superparamagnetic behavior and were found to possess enhanced Sm values, as predicted earlier for magnetic nanocomposites.
Citation
Journal of Applied Physics
Pub Type
Journals

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Keywords

antiferromagnetic, ferromagnetic, magnetic entropy, magnetocaloric, ternary alloys

Citation

Provenzano, V. , Shapiro, A. , King, T. , Canavan, E. , Shirron, P. , DiPirro, M. and Shull, R. (2004), Peak Magnetocaloric Effects in Al-Gd-Fe Alloys, Journal of Applied Physics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=853308 (Accessed December 15, 2024)

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Created June 1, 2004, Updated February 17, 2017