Abstract
XAS and XMCD spectra at the L2,3 absoption edges of mixed valence Ce and Yb compounds are calculated in high magnetic fields ranging from 10 to 1000 T and at zero temperature by using a new theoretical framework proposed very recently by the present author. The XMCD spectra exhibit a peak only for the 4f1 (for Ce) and 4f13 (for Yb) final states. Available experimental data for CePd3 at 7 T is reasonably well explained. With a further increase in the magnetic field strength, the Kondo bound state becomes unstable, and concomitantly the XMCD spectra behave in a different way from those at low magnetic fields. One of the most striking behavior is the field-dependence of the L2 XMCD intensity of the Yb system; the XMCD intensity first increases with the magnetic field strength, but decreases as the Kondo bound state becomes unstable.
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