| Original Articles |
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BO2-F+ Centers in the Radiation-damaged YCOB Crystals |
| RUAN Yong-Feng1;Hiroshi NAKAO2;Takatomo SASAKI2 |
| 1Department of Physics, Tianjin University, Tianjin 300072
2Department of Electrical Engineering, Osaka University, Osaka 565-0871, Japan
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| Cite this article: |
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RUAN Yong-Feng, Hiroshi NAKAO, Takatomo SASAKI 2000 Chin. Phys. Lett. 17 896-898 |
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Abstract An intense paramagnetic EPR signal generated from x-ray-irradiated, powdered YCOB crystals was observed at the liquid nitrogen temperature for the first time. Five peaks, located at the positions where the effective g factor equals to 1.992, 1.986, 1.980, 1.974 and 1.965, labeled as A, B, C, D and E respectively, were observed. It is believed that the peaks A, B, C and D generated from the BO2-F+ center which is a single electron trapped in an oxygen vacancy which was originally occupied by an O2- ion bonded to a (BO3)3- anion group. The peak E is thought of coming from Y2+ ions that are formed by the Y3+ ions trapping electrons. The mechanism for the formation of the radiation-induced defects in the YCOB crystals is suggested.
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| Keywords:
61.80.Az
61.72.Hh
42.70.Mp
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Published: 01 December 2000
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| PACS: |
61.80.Az
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(Theory and models of radiation effects)
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61.72.Hh
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(Indirect evidence of dislocations and other defects (resistivity, slip, creep, strains, internal friction, EPR, NMR, etc.))
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42.70.Mp
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(Nonlinear optical crystals)
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