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Vacancy identification in Co+ doped rutile TiO2 crystal with positron annihilation spectroscopy

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Published under licence by IOP Publishing Ltd
, , Citation X B Qin et al 2011 J. Phys.: Conf. Ser. 262 012051 DOI 10.1088/1742-6596/262/1/012051

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1 Key Laboratory of Nuclear Analysis Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

2 School of Physical Engineering, Zhengzhou University, Zhengzhou, 450001, China

3 College of Physical Science and Technology, Guangxi University, Nanning 530004, China

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1742-6596/262/1/012051

Abstract

Co-doped rutile TiO2 films were synthesized by ion implantation. Variable energy positron annihilation Doppler broadening spectroscopy and coincidence Doppler broadening measurements were performed for identification of the vacancies. A newly formed type of vacancy can be concluded by the S-W plot and the CDB results indicated that the oxygen vacancy (VO) complex Ti-Co-VO and/or Ti-VO are formed with Co ions implantation and the vacancy concentration is increased with increase of dopant dose.

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10.1088/1742-6596/262/1/012051