Oscillatory exchange coupling and giant positive magnetoresistance in TiN/Fe3O4 superlattices

Authors
Orozco, A Ogale, SB Li, YH Fournier, P Li, E Asano, H Smolyaninova, V Greene, RL Sharma, RP Ramesh, R Venkatesan, T
Citation
A. Orozco et al., Oscillatory exchange coupling and giant positive magnetoresistance in TiN/Fe3O4 superlattices, PHYS REV L, 83(8), 1999, pp. 1680-1683
Citations number
28
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
83
Issue
8
Year of publication
1999
Pages
1680 - 1683
Database
ISI
SICI code
0031-9007(19990823)83:8<1680:OECAGP>2.0.ZU;2-I
Abstract
Oscillatory exchange coupling is observed in TiN/Fe3O4 superlattices over l ength scales comparable to metallic superlattices. However, the strength of the coupling is almost an order of magnitude stronger than that commonly o bserved in metallic superlattices. In addition, a unique positive magnetore sistance effect is also seen. These observations an discussed in terms of t he carrier confinement effects caused by the half metallicity of the magnet ic layers.