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Structure and Magnetism of Pure and Co-Doped TiO _{2} Clusters

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3 Author(s)
Xiao-Hui Wei ; Dept. of Phys. & Astron., Univ. of Nebraska, Lincoln, NE, USA ; Ralph Skomski ; D. J. Sellmyer

Anatase TiO2 cluster films having Co concentrations of 0, 6, and 8 at.% were produced by inert-gas condensation and investigated by TEM, AFM, XRD, and SQUID. The cluster films are all magnetically ordered from 10 to 400 K, with magnetizations of about 3 emu/cc, and exhibit perpendicular magnetic anisotropy. For 6% Co, no Co clusters or secondary phases are apparent, but the 8% samples contain Co and CoO. The magnetism of the doped and undoped samples is largely associated with oxygen vacancies which tend to form near the cluster surfaces.

Published in:

IEEE Transactions on Magnetics  (Volume:45 ,  Issue: 10 )