%0 Journal Article
%K Transmission electron microscopy
%K Nanoparticles
%K Titanium dioxide
%K Ferromagnetism
%K Magnetic anisotropy
%K Magnetization
%K Doping (additives)
%K Interfaces (materials)
%K Coercive force
%K Cobalt
%K Electron diffraction
%K Hysteresis loops
%K Hall effect
%K Magnetometers
%K SQUIDs
%K Diluted magnetic semiconductors (DMS)
%K Remanence
%K Magnetic semiconductors
%K Rutherford backscattering spectroscopy
%K Anomalous Hall effects (AHE)
%K Superparamagnetism
%A S.R Shinde
%A S.B Ogale
%A J.S Higgins
%A H Zheng
%A A.J Millis
%A V.N Kulkarni
%A Ramamoorthy Ramesh
%A R.L Greene
%A T Venkatesan
%B Physical Review Letters
%D 2004
%G eng
%I American Physical Society
%P 166601-1-166601-4
%R 10.1103/PhysRevLett.92.166601
%T Co-occurrence of superparamagnetism and anomalous hall effect in highly reduced cobalt-doped rutile TiO2-δ films
%V 92
%X 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.