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Oscillatory Exchange Coupling and Positive Magnetoresistance in Epitaxial Oxide Heterostructures

K. R. Nikolaev·A. Yu. Dobin·I. N. Krivorotov·W. K. Cooley·A. Bhattacharya·A. L. Kobrinskii·L. I. Glazman·R. M. Wentzcovitch·E. Dan Dahlberg·A. M. Goldman
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Abstract

Oscillations in the exchange coupling between ferromagnetic $La_{2/3}Ba_{1/3}MnO_3$ layers with paramagnetic $LaNiO_3$ spacer layer thickness has been observed in epitaxial heterostructures of the two oxides. This behavior is explained within the RKKY model employing an {\it ab initio} calculated band structure of $LaNiO_3$, taking into account strong electron scattering in the spacer. Antiferromagnetically coupled superlattices exhibit a positive current-in-plane magnetoresistance.

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K. R. Nikolaev, A. Yu. Dobin, I. N. Krivorotov, W. K. Cooley, A. Bhattacharya, A. L. Kobrinskii, L. I. Glazman, R. M. Wentzcovitch, E. Dan Dahlberg, A. M. Goldman. 2000-04-13. Oscillatory Exchange Coupling and Positive Magnetoresistance in Epitaxial Oxide Heterostructures. https://doi.org/10.1103/physrevlett.85.3728

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