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(Color online) X-ray absorption spectra of (upper panel) together with normalized and integrated (lower panel) Re -edge XMCD spectra of the compounds studied.
(Color online) The ratio of orbital-to-spin magnetic moment of Re compared with the coercive field of the compounds plotted vs the average radius of alkali earth ions. Inset shows the dependence of Curie temperature vs the effective spin moment of Re ions. Lines are guides for the eyes.
Orbital , spin , and total magnetic moments of Re at in the series. Values are given in for the number of holes derived from the x-ray absorption spectra (first line for each compound) and reported in theoretical calculations. The last four columns present the Re spin moment values reported in literature for the compounds studied references in text). They were determined using neutron diffraction (ND) and nuclear magnetic resonance (NMR) as well as calculated using local spin density approximation (LSDA) and generalized gradient approximation (GGA).
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