J. Phys. IV France 7 (1997) C2-405-C2-408
Soft X-Ray Magnetic Circular Dichroism Study of the Colossal Magnetoresistance Compound La1-xSrxMnO3E. Pellegrin1, L.H. Tjeng1, F.M.F. de Groot1, R. Hesper1, G.A. Sawatzky1, Y. Moritomo2, 3 and Y. Tokura2
1 Materials Science Centre, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
2 Joint Research Center for Atom Technology (JRCAT), Tsukuba 305, Japan
3 Center for Integrated Research in Science and Engineering (CIRSE), Nagoya University, Nagoya 464-01 Japan
Soft X-ray magnetic circular dichroism (SXMCD) measurements are reported on the O K- and Mn L-absorption edges of La1-xSrxMn03 (x = 0.15,0.18, and0.4) single crystals in their ferromagnetic regime. This has been done using a recently developed experimental technique for magnetizing the samples offering the possibility to get high-accuracy SXMCD effect measurements on bulk samples. The very strong doping-induced O AT-edge intensity is proof of an enhanced Olp hole component of the doped holes. O K soft X-ray magnetic circular dichroism spectra give evidence for an orbital magnetic moment of this 02p component ferromagnetically coupled to the Mn moments.
© EDP Sciences 1997