Pressure effects on the magnetic properties of FeCuZr studied by x-ray magnetic circular dichroism: Evidence of weakening of ferromagnetism in FeCuZr alloys

descriptionPublicationkeyboard_double_arrow_right Article 09 Jul 2012 Spain English Publisher:AIP PublishingJournal:Applied Physics Letters, volume 101 (issn: 0003-6951, eissn: 1077-3118,

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Authors: Martínez, A; Romero, J.J.; Bartolome, F.; Garcia, L.M.; Baudelet, F.; Hernando Grande, Antonio; Crespo del Arco, Patricia;

doi: 10.1063/1.4735300

handle: 10261/74172 , 20.500.14352/42605

Pressure effects on the magnetic properties of FeCuZr studied by x-ray magnetic circular dichroism: Evidence of weakening of ferromagnetism in FeCuZr alloys

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Abstract

The room temperature changes of the magnetic behavior under pressure of an invar alloy of nominal composition (Fe0.5Cu0.5)87Zr13 (at. %) has been studied by K-edge x-ray magnetic circular dichroism (XMCD) and x-ray absorption near edge spectroscopy (XANES). The Curie temperature, as determined from low field magnetization measurements, is (255 ± 15)K. However XMCD shows a non negligible signal above this temperature. In addition, the XMCD signal decreases upon increasing pressure indicating a pressure-induced collapse of the magnetic moment. These results evidence the itinerant character of FeCuZr alloys as well as the occurrence of magnetovolume effects characterized by a strong dependence of the 3d band on the Fe-Fe nearest neighbor distances.

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Spain

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Keywords

Amorphous-alloys, Behavior, Física de materiales, Iron, Temperature, Dependence, 538.9, Invar

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