A net moment was observed from Mn in a SrRuO(3)/SrMnO(3) (SRO/SMO) superlattice film via element-specific x-ray resonant magnetic techniques. The collective magnetic behavior of the SRO and SMO layers is significantly modified by their exchange interaction. Bulk magnetometry shows a two-step, easy-axis magnetization reversal process, and x-ray measurements reveal that the reversal with higher coercivity involves the magnetization in the SMO layers. The results provide strong evidence for the presence of pinned SRO magnetization at the SRO/SMO interface. X-ray measurements and micromagnetic simulations reveal that the net Mn moment is due to a canted antiferromagnetic spin configuration in the SMO layers. (c) 2008 American Institute of Physics.
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