Oscillatory exchange coupling and positive magnetoresistance in epitaxial oxide heterostructures
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.
Nikolaev
KR
School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA.
Dobin
AY
Krivorotov
IN
Cooley
WK
Bhattacharya
A
Kobrinskii
AL
Glazman
LI
Wentzovitch
RM
Dahlberg
ED
Goldman
AM