| 1 | Thermodynamic functions of ZrW_2O_8 from its heat capacity显示文摘It is interesting to maximize the amount of information we can obtain from one experiment on a single sample.In obtaining all the thermodynamic properties of some materials from their experimental heat capacity data only,we aim to get the temperature-independent energy spectrum.However,all the practical measured energy spectra depend on the temperature of experiments.One promising method to obtain the temperature-independent energy spectrum is to solve the so-called specific heat-phonon spectrum inversion(SPI) problem.Here we show,by developing a new practical solution method of SPI,the phonon spectrum of the negative thermal expansion material ZrW 2 O 8 is obtained.This phonon spectrum is temperature-independent and almost method independent.Hence all the thermodynamic properties of ZrW 2 O 8,such as thermodynamic potential,entropy,Helmholtz free energy,etc.are obtained by heat capacity only. | Ji FengMin DAI XianXi STEVENS R GOATES J B | 2012 | Science China(Physics,Mechanics & Astronomy)2012，55，4： | 3 |
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