Abstract
A combination of spectroscopic probes was used to develop a detailed experimental description of the transport and magnetic properties of superlattices composed of the paramagnetic metal and the antiferromagnetic insulator . The charge-carrier density and Ru valence state in the superlattices are not significantly different from those of bulk . The small charge transfer across the interface implied by these observations confirms predictions derived from density-functional calculations. However, a ferromagnetic polarization due to canted Mn spins penetrates 3–4 unit cells into , far exceeding the corresponding predictions. The discrepancy may indicate the formation of magnetic polarons at the interface.
- Received 1 June 2009
DOI:https://doi.org/10.1103/PhysRevB.81.094414
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