Temperature dependence of Eu-related EPR spectra in CsBr:Eu needle image plates
Temperature dependence of Eu-related EPR spectra in CsBr:Eu needle image plates
复制标题
CsBr:Eu 针图像板中与 Eu 相关的 EPR 光谱的温度依赖性
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
E. Goovaerts
中科院分区：
文献类型：
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作者：
F. Loncke;H. Vrielinck;P. Matthys;F. Callens;J. Tahon;P. Leblans;I. Ahmad;E. Goovaerts
掺杂 ${ ext{Eu}}^{2+}$ 的真空沉积 CsBr 针板已在大温度区间（4 K：室温）下通过 $Q$ $(ensuremath{sim}34 ext{ } ext{GHz})$ 和 $W$ $(ensuremath{sim}95 ext{ } ext{GHz})$ 带电子顺磁共振进行了研究。在低温$(l35 ext{ } ext{K})$下，发现了两个具有不同对称性的Eu相关中心（四方和斜方），而在早期的室温研究中仅发现了一个具有四方对称的中心。研究了这三种缺陷的可能模型，考虑了它们的温度行为、对称性以及零场分裂参数的非典型值。
Vacuum-deposited CsBr needle plates doped with ${ ext{Eu}}^{2+}$ have been investigated with $Q$ $(ensuremath{sim}34 ext{ } ext{GHz})$ and $W$ $(ensuremath{sim}95 ext{ } ext{GHz})$ band electron paramagnetic resonance in a large temperature interval (4 K: room temperature). At low temperatures $(l35 ext{ } ext{K})$, two Eu-related centers were found with different symmetry (tetragonal and orthorhombic), while in earlier studies at room temperature only one center was found with tetragonal symmetry. Possible models for the three defects are investigated, taking into account their temperature behavior, their symmetry, and the atypical values of their zero-field splitting parameters.