Oscillatory Exchange Coupling and Positive Magnetoresistance in Epitaxial Oxide Heterostructures

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 ba...

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Hauptverfasser:	Nikolaev, K. R, Dobin, A. Yu, Krivorotov, I. N, Cooley, W. K, Bhattacharya, A, Kobrinskii, A. L, Glazman, L. I, Wentzcovitch, R. M, Dahlberg, E. Dan, Goldman, A. M
Format:	Artikel
Sprache:	eng
Schlagworte:	Physics - Materials Science Physics - Strongly Correlated Electrons
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Zusammenfassung:	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.
DOI:	10.48550/arxiv.cond-mat/0004230