title: Origin of the X-ray magnetic circular dichroism at the L-edges of the rare-earths in RxR(1-x)'Al2 systems.
abstract: An X-ray magnetic circular dichroism (XMCD) study performed at the rare-earth L(2,3)-edges in the R(x)R(1-x)'Al(2) compounds is presented. It is shown that both R and R' atoms contribute to the XMCD recorded at the L-edges of the selected rare-earth, either R or R'. The amplitude of the XMCD signal is not directly correlated to the magnetization or to the value of the individual (R, R') magnetic moments, but it is related to the molecular field acting on the rare-earth tuned in the photoabsorption process. This result closes a longstanding study of the origin of the XMCD at the L-edge of the rare-earths in multi-component systems, allowing a full understanding of the exact nature of these signals.
authors.affiliation: Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain. jchaboy@unizar.es
authors.forename: Jesús
authors.initials: J
authors.lastname: Chaboy
authors.forename: María Angeles
authors.initials: MA
authors.lastname: Laguna-Marco
authors.forename: Cristina
authors.initials: C
authors.lastname: Piquer
authors.forename: Roberto
authors.initials: R
authors.lastname: Boada
authors.forename: Neculai
authors.initials: N
authors.lastname: Plugaru
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Maruyama
authors.forename: Naomi
authors.initials: N
authors.lastname: Kawamura
mesh_terms: D002942:Circular Dichroism; D003198:Computer Simulation; D008280:Magnetics; D008674:Metals, Rare Earth / Q000737:chemistry*; D008956:Models, Chemical; D014965:X-Rays
chemical_list: D008674:Metals, Rare Earth