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

AuthorsMartínez, A.; Romero Fanego, Juan José ; Bartolomé, Fernando; García, L. M.
Issue Date2012
PublisherAmerican Institute of Physics
CitationApplied Physics Letters 101(2): 022412 (2012)
AbstractThe room temperature changes of the magnetic behavior under pressure of an invar alloy of nominal composition (Fe 0.5Cu 0.5) 87Zr 13 (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.
Description4 páginas, 6 figuras.-- et al.
Publisher version (URL)http://dx.doi.org/10.1063/1.4735300
Appears in Collections:(ICV) Artículos
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