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Abstracts
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Authors
Park, Y.M., Song, S.K., Jung, J.K., Seo, Y.M. and Choh, S.H.
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Title
14N NQR Investigations of the Mixed Complex Systems; [NaNO2] 1-x[ANO3]x:A=K, Na
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Journal
Jrnl of the Korean Physical Society, Vol 32, Feb 1998, pp. S690-S692
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Abstract:Temperature dependence of the 14N NQR frequency and line width were investigated in the nonisostructural mixed systems [NaNO2] 1-x[ANO3]x with A=K and Na for the temperature range 77 K- 360 K. The results of the line width measurements show a cross over for the impurity induced lattice defects from the fast motion to the static rigid lattice behaviour at around 175 K on decrease of temperature. Above 290 K, on approaching the transition temperature, the critical line broadening caused by the flipping of the NO-2 ions becomes weaker with increasing ANO3content. Comparing with the spin-lattice relaxation data this phenomenon seems to be associated with the enhancement of the activation energy for the flipping of NO- 2 due the presence of lattice defects.
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