Electron spin resonance investigation of the substitution of Fe3+ for Ti4+ ions in rutile TiO2 single crystal
Li Guo-Ke(李国科), Zhang Xiang-Qun(张向群), Wu Hong-Ye(吴鸿业), Huang Wan-Guo(黄万国), Jin Jin-Ling(靳金玲), Sun Young(孙阳), and Cheng Zhao-Hua(成昭华)†
State Key Laboratory of Magnetism and Beijing National Laboratory of Condensed Matter Physics, Institute of Physicss, Chinese Academy of Sciences, Beijing 100190, China
Abstract A Fe doped rutile TiO2 single crystal is grown in an O2 atmosphere by the floating zone technique. Electron spin resonance (ESR) spectra clearly demonstrate that Fe3+ ions are substituted for the Ti4+ ions in the rutile TiO2 matrix. Magnetization measurements reveal that the Fe:TiO2 crystal shows paramagnetic behaviour in a temperature range from 5 K to 350 K. The Fe3+ ions possess weak magnetic anisotropy with an easy axis along the c axis. The annealed Fe:TiO2 crystal shows spin-glass-like behaviours due to the aggregation of the ferromagnetic clusters.
Received: 14 April 2009
Revised: 20 April 2009
Accepted manuscript online:
Fund: Project supported by the National
Basic Research Program of China (Grant No 2009CB929201) and the
National Natural Science Foundation of China (Grant No 10774179).
Cite this article:
Li Guo-Ke(李国科), Zhang Xiang-Qun(张向群), Wu Hong-Ye(吴鸿业), Huang Wan-Guo(黄万国), Jin Jin-Ling(靳金玲), Sun Young(孙阳), and Cheng Zhao-Hua(成昭华) Electron spin resonance investigation of the substitution of Fe3+ for Ti4+ ions in rutile TiO2 single crystal 2009 Chin. Phys. B 18 3551
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