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Applied Physics Letters / Volume 96 / Issue 18 / MAGNETISM AND SUPERCONDUCTIVITY

Appl. Phys. Lett. 96, 182506 (2010); http://dx.doi.org/10.1063/1.3427439 (3 pages)

Influence of Co and Ni addition on the magnetocaloric effect in Fe88−2xCoxNixZr7B4Cu1 soft magnetic amorphous alloys

R. Caballero-Flores1, V. Franco1, A. Conde1, K. E. Knipling2, and M. A. Willard2

1Dpto. Física de la Materia Condensada, ICMSE-CSIC, Universidad de Sevilla, P.O. Box 1065, 41080 Sevilla, Spain
2Multifunctional Materials Branch, U.S. Naval Research Laboratory, 4555 Overlook Avenue, SW, Washington, DC 20375, USA

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(Received 26 March 2010; accepted 19 April 2010; published online 7 May 2010)

We have studied the magnetocaloric effect in a series of Fe88−2xCoxNixZr7B4Cu1 alloys. The partial substitution of Fe by Co and Ni leads to a monotonic increase in the Curie temperature (TC) of the alloys from 287 K for x = 0 to 626 K for x = 11. The maximum magnetic entropy change (ΔSMpk) at an applied field of 1.5 T, shows a value of 1.98 J K−1 kg−1 for x = 8.25. The refrigerant capacity (RC) has maximum values near 166 J kg−1 (for x = 0 and 2.75). These values place the present series of alloys among the best magnetic refrigerant materials, with an RC ∼ 40% larger than Gd5Si2Ge1.9Fe0.1 and ∼ 15% larger than Fe-based amorphous alloys.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

amorphous magnetic materials, boron alloys, cobalt alloys, copper alloys, Curie temperature, entropy, iron alloys, magnetocaloric effects, nickel alloys, soft magnetic materials, zirconium alloys

PACS

  • 75.30.Sg

    Magnetocaloric effect, magnetic cooling

  • 75.50.Kj

    Amorphous and quasicrystalline magnetic materials

  • 75.30.Kz

    Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3427439

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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