High pressure NQR study of some monohydrogen arsenates with positive temperature coefficients |
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| Authors: | M Mackowiak J Stankowski E Lipinski M Zdanowska-Fraczek F Milia |
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| Institution: | Institute of Molecular Physics, Polish Academy of Sciences, poznan, Poland;Nuclear Research Center “Demokritos”, Athens, Greece |
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| Abstract: | Existing studies of the NQR frequency of 75 As nuclei in mono- and dihydrogen arsenates under high hydrostatic pressure have provided highly relevant information concerning the lattice dynamics of these compounds. Recent measurements in such crystals prove that totally different molecular mechanisms are responsible fo the temperature and pressure dependence of the NQR frequency in arsenates with positive and negative ?v/?T. |
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