Co-occurrence of superparamagnetism and anomalous hall effect in highly reduced cobalt-doped rutile TiO2-δ films
Publication Type
Journal Article
Authors
Shinde, S.R., S.B. Ogale, J.S. Higgins, H. Zheng, A.J. Millis, V.N. Kulkarni, Ramamoorthy Ramesh, R.L. Greene, T. Venkatesan
DOI
Abstract
Superparamagnetizm in highly reduced cobalt (Co)-doped rutile TiO 2-δfilms displaying an anomalous Hall effect (AHE) was investigated. The presence of nanosized superparamagnetic cobalt clusters of ∼8-10 nm size in the films at the interface was established using the magnetization and transmission electron microscopy. In a single-domain particle the easy directions of magnetization were separated by the anisotropy barrier. The results indicate the co-occurrence of superparamagnetizm and AHE.
Journal
Physical Review Letters
Volume
92
Year of Publication
2004
ISSN
00319007