INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Preparation and modification of VO2 thin film on R-sapphire substrate by rapid thermal process |
Zhu Nai-Wei (朱乃伟), Hu Ming (胡明), Xia Xiao-Xu (夏晓旭), Wei Xiao-Ying (韦晓莹), Liang Ji-Ran (梁继然) |
School of Electronics and Information Engineering, Tianjin University, Tianjin 300072, China |
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Abstract The VO2 thin film with high performance of metal-insulator transition (MIT) is prepared on R-sapphire substrate for the first time by magnetron sputtering with rapid thermal process (RTP). The electrical characteristic and THz transmittance of MIT in VO2 film are studied by four-point probe method and THz time domain spectrum (THz-TDS). X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and search engine marketing (SEM) are employed to analyze the crystalline structure, valence state, surface morphology of the film. Results indicate that the properties of VO2 film which is oxidized from the metal vanadium film in oxygen atmosphere are improved with a follow-up RTP modification in nitrogen atmosphere. The crystallization and components of VO2 film are improved and the film becomes compact and uniform. A better phase transition performance is shown that the resistance changes nearly 3 orders of magnitude with a 2-℃ hysteresis width and the THz transmittances are reduced by 64% and 60% in thermal and optical excitation respectively.
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Received: 04 September 2013
Revised: 24 October 2013
Accepted manuscript online:
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PACS:
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81.40.Gh
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(Other heat and thermomechanical treatments)
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81.05.Hd
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(Other semiconductors)
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81.40.Rs
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(Electrical and magnetic properties related to treatment conditions)
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81.40.Tv
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(Optical and dielectric properties related to treatment conditions)
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Fund: Project supported by the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 61101055) and the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20100032120029). |
Corresponding Authors:
Hu Ming
E-mail: huming@tju.edu.cn
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About author: 81.40.Gh; 81.05.Hd; 81.40.Rs; 81.40.Tv |
Cite this article:
Zhu Nai-Wei (朱乃伟), Hu Ming (胡明), Xia Xiao-Xu (夏晓旭), Wei Xiao-Ying (韦晓莹), Liang Ji-Ran (梁继然) Preparation and modification of VO2 thin film on R-sapphire substrate by rapid thermal process 2014 Chin. Phys. B 23 048108
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