title: Sum rules in x-ray resonant Raman scattering: recovering the Co ground state information in CoFe2O4 as a test case.
abstract: We present an approach to x-ray resonant Raman scattering suitable for sum-rule analysis. In magnetic systems it gives ground state information as represented by an expansion in coupled multipoles of orbital and spin moments. The experiment is based on the angular dependence of the integrated peak intensities. In 3d transition elements one obtains information up to order 4 from the channel 2p(6)3d(n)-->2p(5)3d(n+1)-->2p(6)3s(1)3d(n+1). By combining these results with L(2,3) absorption dichroism, we show quantitatively the atomiclike properties of cobalt in CoFe2O4 up to high-order multipoles.
authors.affiliation: INFM-Dipartimento di Fisica, Politecnico di Milano, piazza Leonardo da Vinci 32, 20133 Milano, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Braicovich
authors.forename: A
authors.initials: A
authors.lastname: Tagliaferri
authors.forename: G
authors.initials: G
authors.lastname: van der Laan
authors.forename: G
authors.initials: G
authors.lastname: Ghiringhelli
authors.forename: N B
authors.initials: NB
authors.lastname: Brookes