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首页> 外文期刊>Physica, B. Condensed Matter >Investigation of phase transition mechanisms of CsH_3(SeO_3)_2single crystals by observation of nuclear magnetic resonance
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Investigation of phase transition mechanisms of CsH_3(SeO_3)_2single crystals by observation of nuclear magnetic resonance

机译：通过核磁共振观察CsH_3（SeO_3）_2单晶的相变机理

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The relaxation times of the 1H and 133Cs nuclei in CsH)3(SeO)3)_2crystals were investigated using FT NMR.The 133Cs spectrum does change from seven resonance lines to one resonance line near Tm ( = 350 K).The presence of only one 133Cs signal is due to the liquid state resulting from the melting of the crystal.The variation in the separation of the ~(133)Csresonance lines with temperature indicates that the EFG atthe Cs sites produced by the (SeO_3)~(2-)groups varies with temperature, which in turn means that theatoms neighboring ~(133)Csare displaced. And, theT1for133Csis very long and undergoes significantchanges near Tm. The change in the temperature dependence of T1 atTm,for the133Csnuclei coincideswith the melting temperature. These results are compared with those obtained for MH_3(SeO_3)_2(M = Na, K, and Cs) crystals.
机译：使用FT NMR研究了CsH）3（SeO）3）_2晶体中1H和133Cs核的弛豫时间.133Cs的确从7条共振线变成了一条接近Tm（= 350 K）的共振线。一个133Cs信号是由于晶体熔化而形成的液态。〜（133）Cs共振线的分离随温度的变化表明，（SeO_3）〜（2-）在Cs处产生的EFG基团随温度而变化，这反过来意味着〜（133）Cs附近的原子发生了位移。并且，T1for133Csis很长，并且在Tm附近经历重大变化。对于133 C原子核，T1在Tm处的温度依赖性变化与熔融温度一致。将这些结果与MH_3（SeO_3）_2（M = Na，K和Cs）晶体获得的结果进行比较。

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