Interesting magnetic behavior from reduced titanium dioxide nanobelts | Zendy

Shen V. Chong | Zendy; K. Kadowaki | Zendy; J. Xia | Zendy; Hicham Idriss | Zendy

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Interesting magnetic behavior from reduced titanium dioxide nanobelts

Author(s) -

Shen V. Chong,

K. Kadowaki,

J. Xia,

Hicham Idriss

Publication year - 2008

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.2944141

Subject(s) - materials science , electron paramagnetic resonance , anatase , annealing (glass) , superparamagnetism , ferromagnetism , paramagnetism , doping , titanium dioxide , condensed matter physics , titanate , electron , nuclear magnetic resonance , nanotechnology , chemistry , optoelectronics , catalysis , magnetization , magnetic field , metallurgy , physics , biochemistry , ceramic , photocatalysis , quantum mechanics

The magnetic behavior of titanium dioxide nanobelts has been investigated with and without Codoping. Room temperature ferromagnetism was observed when the Co-doped anatase TiO2nanobelts were prepared via vacuum annealing of 2.5 at. % Co-doped titanate nanobelts, whileannealing them in air resulted in paramagnetic ordering. Interestingly, by vacuum annealing theundoped titanate nanobelts under the same conditions, superparamagnetic ordering was observed inthe resulting anatase TiO2 nanobelts. The electron paramagnetic resonance of this latter sampleshows a strong symmetrical signal at g=2.003 suggesting some sort of exchange interactions amongthe localized electrons’ spin moments from single electron trapped in oxygen vacancies

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