六方冰中接近熔点时模式格林艾森参数的温度和压力依赖性
Temperature and pressure dependence of the mode Grüneisen parameters close to the melting point in hexagonal ice.
作者信息
Karacali H, Yurtseven H
机构信息
Department of Physics, Abant Izzet Baysal University, 14280 Gölköy Bolu, Turkey.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2007 Feb;66(2):487-92. doi: 10.1016/j.saa.2006.02.064. Epub 2006 Apr 3.
We reexamine the Pippard relations in this study by relating the specific heat CP to the Raman frequency shifts 1/nu (partial differentialnu/partial differentialT) P and the thermal expansivity alphap to the 1/nu (partial differentialnu/partial differentialP) T, when the mode Grüneisen parameter depends on the temperature and pressure close to the melting point in hexagonal ice. From linear relations between them, the values of the slope dP/dT are deduced in this crystal. Our slope values calculated here do not change significantly compared to those obtained when the mode Grüneisen parameter is taken as a constant close to the melting point in hexagonal ice.
在本研究中，我们重新审视了皮帕德关系，即当模式格鲁涅森参数取决于接近六方冰熔点时的温度和压力时，将定压比热容(C_P)与拉曼频移(1/\nu (\partial\nu/\partial T)_P)相关联，将热膨胀系数(\alpha_p)与(1/\nu (\partial\nu/\partial P)_T)相关联。根据它们之间的线性关系，推导出该晶体中的斜率(dP/dT)值。与在六方冰熔点附近将模式格鲁涅森参数视为常数时获得的斜率值相比，我们在此计算的斜率值没有显著变化。
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