Magnetic moments of W 5d in Ca2CrWO6 and Sr2CrWO6 double perovskites
P. Majewski, S. Gepraegs, A. Boger, M. Opel, A. Erb, R. Gross, G., Vaitheeswaran, V. Kanchana, A. Delin, F. Wilhelm, A. Rogalev, L. Alff
TL;DR
This study measures the magnetic moments of tungsten in double perovskites Sr2CrWO6 and Ca2CrWO6 using XMCD, revealing finite spin and orbital moments and a correlation between magnetic ordering temperature and W magnetic moment.
Contribution
It provides experimental measurements of W magnetic moments in double perovskites and confirms their consistency with band-structure calculations, highlighting the link to magnetic ordering temperature.
Findings
Finite negative spin and positive orbital magnetic moments detected at W sites.
Magnetic moments are consistent with band-structure calculations.
Magnetic ordering temperature correlates with W magnetic moment.
Abstract
We have investigated the magnetic moment of the W ion in the ferrimagnetic double perovskites Sr2CrWO6 and Ca2CrWO6 by X-ray magnetic circular dichroism (XMCD) at the W L(2,3) edges. In both compounds a finite negative spin and positive orbital magnetic moment was detected. The experimental results are in good agreement with band-structure calculations for (Sr/Ca)2CrWO6 using the full-potential linear muffin-tin orbital method. It is remarkable, that the magnetic ordering temperature, TC, is correlated with the magnetic moment at the 'non-magnetic' W atom.
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