Oscillatory exchange coupling and positive magnetoresistance in epitaxial oxide heterostructures

Authors
Nikolaev, KR Dobin, AY Krivorotov, IN Cooley, WK Bhattacharya, A Kobrinskii, AL Glazman, LI Wentzovitch, RM Dahlberg, ED Goldman, AM
Citation
Kr. Nikolaev et al., Oscillatory exchange coupling and positive magnetoresistance in epitaxial oxide heterostructures, PHYS REV L, 85(17), 2000, pp. 3728-3731
Citations number
35
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
85
Issue
17
Year of publication
2000
Pages
3728 - 3731
Database
ISI
SICI code
0031-9007(20001023)85:17<3728:OECAPM>2.0.ZU;2-P
Abstract
Oscillation in the exchange coupling between ferromagnetic La2/3Ba1/3MnO3 l ayers with paramagnetic LaNiO3 spacer layer thickness has been observed in epitaxial heterostructures of the two oxides. This behavior is explained wi thin the RKKY model employing an ab initio calculated band structure of LaN iO3, taking into account strong electron scattering in the spacer. Antiferr omagnetically coupled superlattices exhibit a positive current-in-plane mag netoresistance.