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NMR IN ANTIFERROMAGNETIC COMPLEX HYDRATED MANGANESE CHLORIDES
被引：13
作者：
SPENCE, RD
CASEY, JA
NAGARAJA.V
机构：
[1] Physics Department, Michigan State University, East Lansing, MI
关键词：
D O I：
10.1063/1.1656147
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Chlorine and proton zero-field NMR has been observed in three new antiferromagnetic materials CsMnCl3·2H2O, KMnCl3·2H2O, and Cs2MnCl 4·2H2O. Their Néel temperatures are 4.8, 2.74, and 1.86°K, respectively. In KMnCl3·2H2O and Cs2MnCl4·2H2O at 1°K the chlorine lines lie in the range 6-21 MHz and the proton lines in the range 18-24 MHz. In CsMnCl3·2H2O they lie at half this value. CsMnCl3·2H2O contains linear MnSingle Bond signClSingle Bond signMn chains and this is apparently reflected in its high Néel temperature compared to Cs2MnCl4· 2H2O in which no such chains exist. Presumably the potassium salt also contains such linkages and the Néel temperature and the grouping of the chlorine lines indicate their presence. The transfer hyperfine interactions between the magnanese and chlorines are all approximately equal in these salts, MnCl2·4H2O and Rb2MnCl 4·2H2O for which values have been previously reported. The small variations can be accounted for by differences in MnSingle Bond signCl distances. © 1968 The American Institute of Physics.
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页码：1011 / &
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