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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

10.1103/PhysRevLett.92.166601

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

Year of Publication

2004

ISSN

00319007

Notes

cited By 328

Research Areas

Ramesh Lab