Oscillatory exchange coupling and positive magnetoresistance in epitaxial oxide heterostructures

KR Nikolaev; AY Dobin; IN Krivorotov; WK Cooley; A Bhattacharya; AL Kobrinskii; LI Glazman; RM Wentzovitch; ED Dahlberg; AM Goldman

doi:10.1103/PhysRevLett.85.3728

Oscillatory exchange coupling and positive magnetoresistance in epitaxial oxide heterostructures

Phys Rev Lett. 2000 Oct 23;85(17):3728-31. doi: 10.1103/PhysRevLett.85.3728.

Authors

KR Nikolaev¹, AY Dobin, IN Krivorotov, WK Cooley, A Bhattacharya, AL Kobrinskii, LI Glazman, RM Wentzovitch, ED Dahlberg, AM Goldman

Affiliation

¹ School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA.

PMID: 11030992
DOI: 10.1103/PhysRevLett.85.3728

Abstract

Oscillation in the exchange coupling between ferromagnetic La(2/3)Ba(1/3)MnO3 layers with paramagnetic LaNiO3 spacer layer thickness has been observed in epitaxial heterostructures of the two oxides. This behavior is explained within the RKKY model employing an ab initio calculated band structure of LaNiO3, taking into account strong electron scattering in the spacer. Antiferromagnetically coupled superlattices exhibit a positive current-in-plane magnetoresistance.