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首页> 外文期刊>Physica, B. Condensed Matter >Quasielastic neutron scattering (QNS) study of cation rotation in (CH_3NH_3)_5Bi_2Cl_(11), (CD_3NH_3)_5Bi_2Cl_(11) and (CH_3NH_3)_5Bi_2Br_(11)
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Quasielastic neutron scattering (QNS) study of cation rotation in (CH_3NH_3)_5Bi_2Cl_(11), (CD_3NH_3)_5Bi_2Cl_(11) and (CH_3NH_3)_5Bi_2Br_(11)

机译:(CH_3NH_3)_5Bi_2Cl_(11),(CD_3NH_3)_5Bi_2Cl_(11)和(CH_3NH_3)_5Bi_2Br_(11)中阳离子旋转的准弹性中子散射(QNS)研究

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摘要

Rotation of (CH_3NH_3)~+ cations in crystalline (CH_3NH_3)_5Bi_2Cl_(11), (CD_3NH_3)_5Bi_2Cl_(11) and (CH_3NH_3)_5Bi_2Br_(11) was studied by QNS. The model of instantaneous 120 deg jumps of whole cations around their C-N axes was fitted to the experimental data. The parameters describing reorientation obtained for two types of cations agree well with the results of NMR experiments.
机译:用QNS研究了(CH_3NH_3)_5Bi_2Cl_(11),(CD_3NH_3)_5Bi_2Cl_(11)和(CH_3NH_3)_5Bi_2Br_(11)中(CH_3NH_3)〜+阳离子的旋转。整个阳离子围绕它们的C-N轴瞬时120度跃迁的模型适合于实验数据。描述两种阳离子获得的重新取向的参数与NMR实验的结果非常吻合。

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