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Chin. Phys. B, 2009, Vol. 18(8): 3551-3554    DOI: 10.1088/1674-1056/18/8/069
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

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.
Keywords:  rutile      electron spin resonance      diluted magnetic semiconductors  
Received:  14 April 2009      Revised:  20 April 2009      Accepted manuscript online: 
PACS:  76.30.Fc (Iron group (3d) ions and impurities (Ti-Cu))  
  75.20.Ck (Nonmetals)  
  75.30.Gw (Magnetic anisotropy)  
  75.50.Pp (Magnetic semiconductors)  
  75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects)  
  81.10.Fq (Growth from melts; zone melting and refining)  
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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