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http://dx.doi.org/10.6564/JKMRS.2010.14.2.076

133Cs Nuclear Magnetic Resonance Relaxation Study of the Phase Transition of Cs2MnCl4·2H2O Single Crystals  

Heo, Cheol (Department of Science Education, Jeonju University)
Lim, Ae-Ran (Department of Science Education, Jeonju University)
Publication Information
Journal of the Korean Magnetic Resonance Society / v.14, no.2, 2010 , pp. 76-87 More about this Journal
Abstract
The structural phase transition of $Cs_2MnCl_4{\cdot}2H_2O$ single crystals was investigated by determining the $^{133}Cs$ spin-lattice relaxation time $T_1$. The number of resonance lines in the $^{133}Cs$ spectrum changes from seven to one near 375 K, which means that above 375 K the Cs sites are symmetric. Further, the $T_1$ of the $^{133}Cs$ nucleus undergoes a significant change near 375 K, which coincides with the change in the splitting of the $^{133}Cs$ resonance lines. The change in $T_1$ near $T_C$ is related to the loss of $H_2O$, and means that the forms of the octahedra of water molecules surrounding $Cs^+$ are disrupted.
Keywords
$Cs_2MnCl_4{\cdot}2H_2O$; nuclear magnetic resonance; spin-lattice relaxation time; phase transition temperature;
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Times Cited By KSCI : 2  (Citation Analysis)
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