SOFT-X-RAY MAGNETIC CIRCULAR-DICHROISM STUDY OF THE COLOSSAL MAGNETORESISTANCE COMPOUND LA1-XSRXMNO3

Soft X-ray magnetic circular dichroism (SXMCD) measurements are report ed on the O K- and Mn L-absorption edges of La1-xSrxMnO3 (x = 0.15,0.1 8, and 0.4) single crystals in their ferromagnetic regime. This has be en done using a recently developed experimental technique for magnetiz ing the samples offering the possibility to get high-accuracy SXMCD ef fect measurements on bulk samples. The very strong doping-induced O K- edge intensity is proof of an enhanced O2p hole component of the doped holes. O K soft X-ray magnetic circular dichroism spectra give eviden ce for an orbital magnetic moment of this O2p component ferromagnetica lly coupled to the Mn moments.