Anomalous thermoelastic behaviour of orientationally disordered (NH4I)x(KI)1−x mixed crystals
作者： Alpana Tiwari , N.K. Gaur , R.K. Singh
DOI: 10.1016/J.JPCS.2010.01.004
关键词: Coupling (probability) 、 Condensed matter physics 、 SHELL model 、 Thermoelastic damping 、 Fourth order 、 Thermodynamics 、 Materials science 、 Three-body force
摘要: Abstract We have incorporated the translational rotational (TR) coupling effects in framework of three body force shell model (TSM) to develop an extended TSM (ETSM). This ETSM has been applied reveal second order elastic constants ( C 11 , 12 and 44 ) dilute regimes 0≤ x ≤0.50. Our theoretical results reproduced well observed variations =0.14, 0.43) with temperature. The anomalous behaviour below 150 K for =0.43 predicted by orientationally disordered (NH 4 I) (KI) 1− mixed crystals. are good agreement experimental data available =0.14 0.43. Besides, third fourth on cohesive thermophysical properties also discussed.
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