| 掺杂锗酸铋晶体(Bi_4Ge_3O_(12))的电子顺磁共振 |
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| 引用本文： | 魏宗英,金通政,韩世莹,睦云霞,何崇藩,殷之文.掺杂锗酸铋晶体(Bi_4Ge_3O_(12))的电子顺磁共振[J].无机材料学报,1990(2). |
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| 作者姓名： | 魏宗英 金通政 韩世莹 睦云霞 何崇藩 殷之文 |
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| 作者单位： | 中国科学院上海硅酸盐研究所
(魏宗英，何崇藩)，南京大学固体微结构物理实验室
(金通政，韩世莹，睦云霞)，中国科学院上海硅酸盐研究所(殷之文) |
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| 基金项目： | 南京大学固体微结构物理开放实验室基金 |
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| 摘 要： | 用电子顺磁共振方法对 Fe、Cr 和 Mn 杂质在 Bi_4Ge_3O_(12)晶体中的位置和价态进行了研究。测试并分析了和 Fe~(3+)和 Cr~(3+)离子的 EPR 谱线位置随磁场方向的变化,确定了 Fe~(3+)和 Cr~(3+)主要进入氧四面体占据 Ge位。测试并分析了 Mn~(4+)和Mn~(2+)掺杂样品各向异性的 EPR 谱线,也测试了处于晶体粉末态及玻璃态的 Mn 掺杂样品的谱线,认为 Mn~(2+)离子进入氧八面体占据 Bi 位。紫外线辐照后 Mn 离子 EPR 信号降低表明辐照导致 Mn 离子价态改变。
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| 关 键 词： | 锗酸铋 电子顺磁共掁 掺杂 晶体 |
Electron Paramagnetic Resonance Study of Doped Bismuth Germanate Crystal |
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| Wei Zongying Jin Tongzheng Han Shiying Xu Yunxia He Chongfan Yin Zhiwen.Electron Paramagnetic Resonance Study of Doped Bismuth Germanate Crystal[J].Journal of Inorganic Materials,1990(2). |
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| Authors: | Wei Zongying Jin Tongzheng Han Shiying Xu Yunxia He Chongfan Yin Zhiwen |
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| Affiliation: | Wei Zongying Jin Tongzheng~+ Han Shiying~+ Xu Yunxia~+ He Chongfan Yin Zhiwen |
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| Abstract: | The position and valency of Fe,Cr and Mn impurities in Bi_4Ge_3O_(12) crystalwere studied by means of electron paramagnetic resonance.The variation of EPRspectra of Fe~(3+) and Cr~(3+) with magnetic field directions was measured and analysed.It was determined that Fe~(3+) and Cr~(3+) ions mainly situated in Ge sites of oxygentetrahedra.The anisotropic EPR spectra of Mn~(4+) doped and Mn~(2+) doped sampleswere measured and analysed,and the spectra of Mn doped samples in crystal pow-der state and in glass state were also measured.It was estimated that Mn~(2+) ionssituated in Bi sites of oxygen octahedra,The decrease of EPR signal intensity ofMn ion means the change of the valency of Mn after ultraviolet irradiation. |
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| Keywords: | Bismuth Germanate Bi_4Ge_3O_(12) Electron paramagnetic resonance Doped crystal |
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