Chromium doped manganites: evidence for electronically phase-separated systems
Laboratoire CRISMAT, Université de CaenUMR 6508 associée au CNRS, ISMRA,
boulevard Maréchal Juin, 14050 Caen Cedex, France
2 ESRF, BP 220, 38043 Grenoble Cedex, France
Published online: 15 November 2000
X-ray absorption spectroscopy (XAS) and soft-X-ray magnetic circular dichroism (SXMCD) at the Mn L-, Cr L- and O-K edges of Sm0.5Ca0.5MnCrxO3 () bulk polycrystalline samples have been performed at T=20 K below the ferromagnetic Curie temperature. We show the existence of a magnetic sublattice on each of the probed cations. Considering an electronically phase-separated system, results are compared with magnetization and resistivity measurements and a tentative correlation with magnetoresistance properties on such doped compounds is discussed.
PACS: 75.30.Vn – Colossal magnetoresistance / 78.70.Dm – X-ray absorption spectra / 75.25.+z – Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000