SHARP-LINE FLUORESCENCE, ELECTRON PARAMAGNETIC RESONANCE, AND THERMOLUMINESCENCE OF MN4+ IN ALPHA-AL2O3
SHARP-LINE FLUORESCENCE, ELECTRON PARAMAGNETIC RESONANCE, AND THERMOLUMINESCENCE OF MN4+ IN ALPHA-AL2O3
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DOI：
10.1103/physrev.126.1684
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发表时间：
1962-01-01
期刊：
影响因子：
--
通讯作者：
WOOD, DL
中科院分区：
文献类型：
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作者：
GESCHWIND, S;KISLIUK, P;WOOD, DL
在α-Al 2 O3中观察到了锐线荧光、基态顺磁共振和Mn 4+的光吸收（类似于Cr 3+）。Mn 4+的价态是通过与Mg 2+的电荷补偿获得的。与Cr 3+相比，Mn 4+的电荷增加导致更强的晶场和更大的共价性，其效应在光学和顺磁共振结果中都可以清楚地看到。基态分裂为0.39 cm− 1，几乎与红宝石相同，而亚稳态E2态分裂为80 cm− 1。当用紫外线（< 3000 nm）照射晶体时，超过50%的Mn 4+基态被减少，因为长寿命的陷阱被填充，这些陷阱通过E2态通过尖锐的线热释光衰减。简要讨论了它在光脉泽中的可能应用。
Sharp-line fluorescence, paramagnetic resonance in the ground state, and optical absorption due to Mn 4+ in α-Al 2 O 3 have been observed (analog of Cr 3+). The Mn 4+ valence state is obtained by charge compensation with Mg 2+. The increased charge of Mn 4+ compared to Cr 3+ results in a stronger crystal field and greater covalency whose effects are clearly seen in both the optical and paramagnetic resonance results. The ground state splitting is 0.39 cm− 1, almost the same as in ruby, while the metastable E 2 state splitting is 80 cm− 1. When the crystals are irradiated with ultraviolet (< 3000 Å), more than 50% of the ground state of Mn 4+ is depopulated, as long-lived traps are filled which decay via the E 2 states through sharp-line thermoluminescence. The possible application to light masers is briefly discussed.