Lanthanide Ions as Local Probes in Ionic Hydrides: A Pulsed Electron Nuclear Double Resonance and Thermoluminescence Study of Eu2+-Doped Hydride Perovskites

Lanthanide Ions as Local Probes in Ionic Hydrides: A Pulsed Electron Nuclear Double Resonance and Thermoluminescence Study of Eu2+-Doped Hydride Perovskites
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稀土离子作为离子氢化物中的局域探针:Eu2 掺杂氢化物钙钛矿的脉冲电子核双共振和热释光研究

DOI:
10.1021/acs.jpcc.8b12420
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发表时间:
2019
期刊:
The Journal of Physical Chemistry C
影响因子:
--
通讯作者:
N. Kunkel
N. Kunkel
中科院分区:
--
文献类型:
--
作者:
Th. Wylezich;R. Böttcher;A. Sontakke;V. Castaing;B. Viana;A. Pöppl;N. Kunkel

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利用脉冲电子顺磁共振光谱和光学光谱的Eu2+作为一个本地探针在超导体的模型研究提出了Eu2+掺杂(和共掺杂)的钙钛矿LiMH 3和LiMD 3(M = Sr或Ba)。进行了双脉冲场扫描电子自旋回波、Davies和Mims电子核双共振、Davies型差三重共振实验、热释光光谱以及密度泛函计算。电子核双共振光谱允许明确确定掺杂剂离子占据的位置,这是正确解释光谱所需的重要信息。关于目前的重要性,掺杂稀土或过渡金属离子和脉冲EPR和光学光谱的组合,可以作为一个有前途的和方便的工具,用于研究这些材料的掺杂和混合阴离子掺杂。
A model study on the use of pulsed electron paramagnetic resonance spectroscopy and optical spectroscopy of Eu2+as a local probe in hydrides is presented for the Eu2+-doped (and codoped) perovskites LiMH3and LiMD3(M = Sr or Ba). Two-pulse field-swept electron spin echo, Davies and Mims electron nuclear double resonance, Davies-type difference triple resonance experiments, and thermoluminescence spectroscopy, as well as density functional calculations, were carried out. Electron nuclear double resonance spectroscopy allows for an unambiguous determination of the position occupied by the dopant ion, which is important information necessary for the correct interpretation of optical spectra. With regard to the current importance of hydrides and mixed anionic hydrides, doping with rare-earth or transition-metal ions and the combination of pulsed EPR and optical spectroscopy may serve as a promising and convenient tool for studying such materials.
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