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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

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Martínez, A and Romero, J.J. and Bartolome, F. and Garcia, L.M. and Baudelet, F. and Hernando Grande, Antonio and Crespo del Arco, Patricia (2012) Pressure effects on the magnetic properties of FeCuZr studied by x-ray magnetic circular dichroism: Evidence of weakening of ferromagnetism in FeCuZr alloys. Applied physics letters, 101 (2). ISSN 0003-6951

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Official URL: http://dx.doi.org/10.1063/1.4735300


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Abstract

The room temperature changes of the magnetic behavior under pressure of an invar alloy of nominal composition [Fe_(0.5)Cu_(0.5)]_(87)Zr_(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.


Item Type:Article
Additional Information:

©2012 American Institute of Physics.
This work was supported by Spanish MICINN under MAT2009-14741-C02-01, MAT11/1077, Consolider-Ingenio in Molecular Nanoscience, CSD2007-00010

Uncontrolled Keywords:Amorphous-alloys; Temperature; Invar; Iron; Dependence; Behavior
Subjects:Sciences > Physics > Materials
ID Code:41619
Deposited On:10 Mar 2017 15:11
Last Modified:14 Feb 2018 15:06

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