MAGNETIZATION CURVES FOR ANISOTROPIC MAGNETIC IMPURITIES ADSORBED ON A NORMAL METAL SUBSTRATE

摘要

Magnetization curves (B,T) for magnetic impurities which couple to the host medium via exchange interactions are computed using the numer-ical renormalization group. Deviations from the ideal paramagnetic behavior (as described by the Brillouin function) is discussed for various T/T_K ratios, where T_K is the Kondo temperature, focusing on the implications for the interpre-tation of experimental X-ray magnetic circular dichroism (XMCD) results. The case of anisotropic impurities is also considered.