A study of the electric quadrupole Raman processes of the proton-conducting KHSeO4 and KDSeO4 single crystals using 1H, 2H and 39K NMR

Ae Ran Lim; Choon Sup Yoon

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A study of the electric quadrupole Raman processes of the proton-conducting KHSeO4 and KDSeO4 single crystals using 1H, 2H and 39K NMR

机译：使用1H，2H和39K NMR研究质子传导KHSeO4和KDSeO4单晶的电四极拉曼过程

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The spin-lattice relaxation time, T1, and the spin-spin relaxation time, T2, of the 1H, 2H, and 39K nuclei in KHSeO4 and KDSeO4 crystals were determined in the temperature range 160-420 K. The T1 of the 39K nuclei in the two crystals were found to decrease with increasing temperature, and the spin-lattice relaxation rate, T1-1, for 39K is proportional to Tk. In the case of KHSeO4, T1-1 for the 39K nuclei was found to have a very strong temperature dependence, i.e. it is proportional to T7. The temperature dependence of the 39K relaxation rate in KDSeO4 is in accordance with a Raman process, as T1-1 T2. Thus, for the 39K nuclei in the two crystals, Raman processes with k = 2 and 7 is due to the coupling of electric quadrupole moments to the thermal fluctuations of the local electric field gradients.

机译：确定了KHSeO4和KDSeO4晶体中1H，2H和39K核的自旋晶格弛豫时间T1和自旋自旋弛豫时间T2是在160-420 K的温度范围内确定的。39K核的T1发现这两个晶体中的Tk随温度升高而降低，并且39K的自旋晶格弛豫速率T1-1与Tk成比例。在KHSeO4的情况下，发现39K核的T1-1具有非常强的温度依赖性，即与T7成正比。 KDSeO4中39K弛豫速率的温度依赖性与拉曼过程一致，即T1-1 T2。因此，对于两个晶体中的39K核，k = 2和7的拉曼过程是由于电四极矩耦合到局部电场梯度的热涨落而引起的。

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《Physica status solidi, B. Basic research》 |2008年第8期|共6页
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Ae Ran Lim; Choon Sup Yoon;
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1. A study of the electric quadrupole Raman processes of the proton-conducting KHSeO4 and KDSeO4 single crystals using 1H, 2H and 39K NMR [J] . Ae Ran Lim, Choon Sup Yoon Physica status solidi, B. Basic research . 2008,第8期

机译：使用1H，2H和39K NMR研究质子传导KHSeO4和KDSeO4单晶的电四极拉曼过程
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A study of the electric quadrupole Raman processes of the proton-conducting KHSeO4 and KDSeO4 single crystals using 1H, 2H and 39K NMR

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