Author:
Galakhov V. R.,Udintseva M. S.,Smirnov D. A.,Makarova A. A.,Kuepper K.
Abstract
We present X-ray photoelectron, Co $${{L}_{{2,3}}}$$ and O K X-ray absorption, as well as Co $$K{{\beta }_{{1,3}}}$$ X-ray emission spectroscopy results of studies of the spin states of trivalent cobalt ions in single-crystal cobaltite LaCoO3. We show that at room temperature, in the bulk of a LaCoO3 single crystal, Co3+ ions are in the low-spin state, while high-spin Co2+, high-spin Co3+, low-spin Co3+, and probably also intermediate-spin Co3+ ions are located on the surface.
Subject
Physics and Astronomy (miscellaneous)