X-ray magnetic circular dichroism study on $\rm CeFe_2$

Author： Delobbe A.   Dias A.-M.   Finazzi M.   Stichauer L.   Kappler J.-P.   Krill G.  

Publisher： Edp Sciences

E-ISSN： 1286-4854|43|3|320-325

ISSN： 0295-5075

Source： EPL (EUROPHYSICS LETTERS), Vol.43, Iss.3, 2010-03, pp. : 320-325

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Abstract

X-ray magnetic circular dichroism at the Fe $L_{2,3}$, Ce $M_{4,5}$ and Ce $L_{2,3}$absorption edges of $\rm CeFe_2$ are reported. Application of the sum rules yields both the magnitude and the direction of the magnetic contributions (Fe 3d, Ce 5d and Ce 4f) to the total moment in $\rm CeFe_2$. A total Ce magnetic contribution of $-0.29\mu_{\rm B}$ ($M^{5d}=-0.13\mu_{\rm B}$, $M^{4f}=-0.16\mu_{\rm B}$) and aratio for the 4f contribution $\langle L_z\rangle/\langle S_z\rangle \approx -1$ are found, whichconfirms that the 4f states are highly hybridised in $\rm CeFe_2$. These results are ingood agreement with previously published LSDA calculations.

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