Microscopic observation of impurities in TiO2 using radioactive nuclear probes

M. Mihara; S. Kumashiro; H. Fujiwara; R. Matsumiya; K. Matsuta; Y. Nakashima; Y. N. Zheng; M. Ogura; T. Sumikama; T. Nagatomo; K. Minamisono; M. Fukuda; T. Izumikawa; T. Minamisono

doi:10.1016/j.physb.2005.12.237

Microscopic observation of impurities in TiO₂ using radioactive nuclear probes

M. Mihara, S. Kumashiro, H. Fujiwara, R. Matsumiya, K. Matsuta, Y. Nakashima, Y. N. Zheng, M. Ogura, T. Sumikama, T. Nagatomo, K. Minamisono, M. Fukuda, T. Izumikawa, T. Minamisono

SCI - Physics

Research output: Contribution to journal › Conference article › peer-review

2 Citations (Scopus)

Abstract

The dynamical behavior of nitrogen impurity in TiO₂ was examined microscopically by means of the β-NMR technique. Short-lived radioactive nucleus ¹²N(I=1, T1/2=11ms) was implanted into a single crystal of rutile TiO₂ and its NMR was observed at 300-900 K through the β-ray detection. Spin-lattice relaxation due to a fluctuation of the nuclear quadrupole interaction induced by an atomic motion was observed for oxygen substitutional and interstitial lattice sites. The corresponding amplitude of the fluctuation for the substitutional site was found to be much smaller than the static quadrupole field. From this result and the deduced activation energy, we infer that a substitutional ¹²N atom remains in the site and the observed spin-lattice relaxation is attributed to the motion of some kind of defects. The possibility of interstitial nitrogen diffusion is also discussed.

Original language	English
Pages (from-to)	955-958
Number of pages	4
Journal	Physica B: Condensed Matter
Volume	376-377
Issue number	1
DOIs	https://doi.org/10.1016/j.physb.2005.12.237
Publication status	Published - 2006 Apr 1
Event	Proceedings of the 23rd International Conference on Defects in Semiconductors - Duration: 2005 Jul 24 → 2005 Jul 29

Keywords

Atomic jump
Implantation
TiO
β-NMR

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1016/j.physb.2005.12.237

Cite this

Mihara, M., Kumashiro, S., Fujiwara, H., Matsumiya, R., Matsuta, K., Nakashima, Y., Zheng, Y. N., Ogura, M., Sumikama, T., Nagatomo, T., Minamisono, K., Fukuda, M., Izumikawa, T., & Minamisono, T. (2006). Microscopic observation of impurities in TiO₂ using radioactive nuclear probes. Physica B: Condensed Matter, 376-377(1), 955-958. https://doi.org/10.1016/j.physb.2005.12.237

Mihara, M, Kumashiro, S, Fujiwara, H, Matsumiya, R, Matsuta, K, Nakashima, Y, Zheng, YN, Ogura, M, Sumikama, T, Nagatomo, T, Minamisono, K, Fukuda, M, Izumikawa, T & Minamisono, T 2006, 'Microscopic observation of impurities in TiO₂ using radioactive nuclear probes', Physica B: Condensed Matter, vol. 376-377, no. 1, pp. 955-958. https://doi.org/10.1016/j.physb.2005.12.237

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title = "Microscopic observation of impurities in TiO2 using radioactive nuclear probes",

abstract = "The dynamical behavior of nitrogen impurity in TiO2 was examined microscopically by means of the β-NMR technique. Short-lived radioactive nucleus 12N(I=1, T1/2=11ms) was implanted into a single crystal of rutile TiO2 and its NMR was observed at 300-900 K through the β-ray detection. Spin-lattice relaxation due to a fluctuation of the nuclear quadrupole interaction induced by an atomic motion was observed for oxygen substitutional and interstitial lattice sites. The corresponding amplitude of the fluctuation for the substitutional site was found to be much smaller than the static quadrupole field. From this result and the deduced activation energy, we infer that a substitutional 12N atom remains in the site and the observed spin-lattice relaxation is attributed to the motion of some kind of defects. The possibility of interstitial nitrogen diffusion is also discussed.",

keywords = "Atomic jump, Implantation, TiO, β-NMR",

author = "M. Mihara and S. Kumashiro and H. Fujiwara and R. Matsumiya and K. Matsuta and Y. Nakashima and Zheng, {Y. N.} and M. Ogura and T. Sumikama and T. Nagatomo and K. Minamisono and M. Fukuda and T. Izumikawa and T. Minamisono",

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AU - Mihara, M.

AU - Kumashiro, S.

AU - Fujiwara, H.

AU - Matsumiya, R.

AU - Matsuta, K.

AU - Nakashima, Y.

AU - Zheng, Y. N.

AU - Ogura, M.

AU - Sumikama, T.

AU - Nagatomo, T.

AU - Minamisono, K.

AU - Fukuda, M.

AU - Izumikawa, T.

AU - Minamisono, T.

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N2 - The dynamical behavior of nitrogen impurity in TiO2 was examined microscopically by means of the β-NMR technique. Short-lived radioactive nucleus 12N(I=1, T1/2=11ms) was implanted into a single crystal of rutile TiO2 and its NMR was observed at 300-900 K through the β-ray detection. Spin-lattice relaxation due to a fluctuation of the nuclear quadrupole interaction induced by an atomic motion was observed for oxygen substitutional and interstitial lattice sites. The corresponding amplitude of the fluctuation for the substitutional site was found to be much smaller than the static quadrupole field. From this result and the deduced activation energy, we infer that a substitutional 12N atom remains in the site and the observed spin-lattice relaxation is attributed to the motion of some kind of defects. The possibility of interstitial nitrogen diffusion is also discussed.

AB - The dynamical behavior of nitrogen impurity in TiO2 was examined microscopically by means of the β-NMR technique. Short-lived radioactive nucleus 12N(I=1, T1/2=11ms) was implanted into a single crystal of rutile TiO2 and its NMR was observed at 300-900 K through the β-ray detection. Spin-lattice relaxation due to a fluctuation of the nuclear quadrupole interaction induced by an atomic motion was observed for oxygen substitutional and interstitial lattice sites. The corresponding amplitude of the fluctuation for the substitutional site was found to be much smaller than the static quadrupole field. From this result and the deduced activation energy, we infer that a substitutional 12N atom remains in the site and the observed spin-lattice relaxation is attributed to the motion of some kind of defects. The possibility of interstitial nitrogen diffusion is also discussed.

KW - Atomic jump

KW - Implantation

KW - TiO

KW - β-NMR

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