Thermo-reversible permanent magnets in the quasi-binary GdCo5-xCux system

Ferrimagnetic GdCo5-xCux alloys exhibiting the effect of Gd- and 3d-sublattice magnetization compensation at defined temperatures were studied with respect to their use as thermo-reversible permanent magnets (PM). Coercive fields Μ0Hc in the range 0.3 to 1.6 T were measured for annealed single cryst...

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Bibliographic Details
Published in:Applied physics letters 2006, Vol.89
Main Authors: Grechishkin, Rostislav M., Kustov, Mikhail S., Cugat, Orphee, Delamare, Jerome, Poulin, Guylaine, Mavrudieva, Diana, Dempsey, Nora
Format: Article
Language:English
Subjects:
Condensed Matter
Materials Science
Physics
Online Access:Get full text
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Summary:Ferrimagnetic GdCo5-xCux alloys exhibiting the effect of Gd- and 3d-sublattice magnetization compensation at defined temperatures were studied with respect to their use as thermo-reversible permanent magnets (PM). Coercive fields Μ0Hc in the range 0.3 to 1.6 T were measured for annealed single crystals with x = 1 – 2.2 having compensation points in the vicinity of room temperature. Two applications of such a thermo-reversible PM, namely a thermally controlled actuator and a contactless temperature sensor, are demonstrated.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2347282