HIGH THERMAL STABILITY OF THE OFF-CENTER PARAMAGNETIC Fe3+ IONS IN CHLORINATED SrCl2:Fe2+ CRYSTALS

被引：0
|
作者：
Ghica, D. [1 ]
Nistor, S. V. [1 ]
机构：
[1] Natl Inst Mat Phys, RO-077125 Bucharest, Romania
来源：
ROMANIAN REPORTS IN PHYSICS | 2013年 / 65卷 / 03期
关键词：
SrCl2; Fe-related paramagnetic centers; electron paramagnetic resonance; SINGLE-CRYSTALS; EPR; RESONANCE;
D O I：
暂无
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The thermal stability above 300 K of the hole-trapped Fe3+ centers, formed by X-ray irradiation at 80 K in chlorinated SrCl2:Fe2+ crystals, has been investigated by Electron Paramagnetic Resonance. In the temperature range of 300 - 520 K, the trigonal Fe3+ center completely transforms into the cubic Fe3+ center, which further decays up to 700 K. The formation and transformation of the trigonal Fe3+ center, containing off-center Fe3+ ions, is associated with the presence and thermally activated movement of the interstitial Cl- ions, present in excess in chlorinated SrCl2:Fe2+ crystals.
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页码：825 / 831
页数：7
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