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首页> 外文会议>Symposium on Ion Beam Synthesis and Processing of Advanced Materials held Nov 27-29, 2000, Boston, Massachusetts, U.S.A. >Coordination structure of implanted manganese ions in silica glass
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Coordination structure of implanted manganese ions in silica glass

机译：石英玻璃中注入的锰离子的配位结构

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摘要

180 keV Mn~+ ions were implanted in silica glass at doses ranging from 1 X 10~(16) to 2 X 10~(17) ions/cm~2 at room temperature. The coordination structure of implanted Mn atoms was studied by X-ray absorption spectroscopy. It was found that Mn atoms were mainly coordinated by O atoms in silica glasses as-implanted at doses lower than 5 X l0~(16)Mn~+ions/cm~2. The Mn-O bond distance was 2.07 A and the coordination number was 4.3 in average. Mn atoms were mainly coordinated by Mn and O atoms in the glasses as-implanted at doses higher than 1 X l0~(17)Mn~+ions/cm~2. In all the glasses, Mn atoms which are coordinated by O atoms were present as divalent state. After heating at 700 ℃ in air, Mn atoms were present as trivalent state and tended to form oxide crystals.
机译：在室温下，将180 keV Mn〜+离子以1 X 10〜（16）到2 X 10〜（17）离子/ cm〜2的剂量注入到石英玻璃中。通过X射线吸收光谱研究了注入的Mn原子的配位结构。发现在低于5 X 10〜（16）Mn〜+离子/ cm〜2的剂量下，石英玻璃中Mn原子主要由O原子配位。 Mn-O键距离为2.07A，平均配位数为4.3。植入后的玻璃中，Mn原子主要由Mn和O原子配位，剂量大于1 X 10〜（17）Mn〜+离子/ cm〜2。在所有玻璃中，由O原子配位的Mn原子以二价态存在。在空气中700℃加热后，Mn原子以三价态存在并趋于形成氧化物晶体。

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