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Abstract:
We report a study of the local magnetism in thin films of SrRuO3 grown
on (111) and (001) oriented SrTiO3 substrates using x-ray magnetic
circular dichroism spectroscopy (XMCD) at the Ru-L-2,L-3 edges. The
application of the sum rules to the XMCD data gives an almost quenched
orbital moment and a spin moment close to the value expected for the low
spin state S = 1. Full-multiplet cluster calculations indicate that the
low spin state is quite stable and suggest that the occurrence of a
transition to the high spin state S = 2 in strained thin films of SrRuO3
is unlikely as it would be too expensive in energy.