Origin of the X-ray magnetic circular dichroism at the L-edges of the rare-earths in RxR(1-x)'Al2 systems.
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.
Chaboy
Jesús
J
Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain. jchaboy@unizar.es
Laguna-Marco
María Angeles
MA
Piquer
Cristina
C
Boada
Roberto
R
Plugaru
Neculai
N
Maruyama
Hiroshi
H
Kawamura
Naomi
N
D002942:Circular Dichroism; D003198:Computer Simulation; D008280:Magnetics; D008674:Metals, Rare Earth / Q000737:chemistry*; D008956:Models, Chemical; D014965:X-Rays
D008674:Metals, Rare Earth