Possible Phonon Density of States of High-Temperature Phase Structure of the Negative Thermal Expansion Compound ZrW2O8
Possible Phonon Density of States of High-Temperature Phase Structure of the Negative Thermal Expansion Compound ZrW2O8
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负热膨胀化合物ZrW2O8高温相结构可能的声子密度
DOI：
10.1143/jpsj.76.123603
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发表时间：
2007
影响因子：
1.7
通讯作者：
Kazuya Saito
中科院分区：
文献类型：
--
作者：
Y. Yamamura;Kazuya Saito
为了研究具有负热膨胀（NTE）特性的β-ZrW 2 O 8的声子性质，测量并分析了Zr 1-xMxW 2 O 8- y（M = Sc，Lu; x = 0.02，0.04）的低温热容.分析结果表明，β-ZrW 2 O 8的有效声子态密度在5 meV附近呈圆形.β-ZrW 2 O 8与低温相ZrW 2 O 8的圆化声子态密度形成明显的对比，这与两种结构的NTE性质的差异是一致的。
To study the phonon properties of β-ZrW 2 O 8 showing the negative thermal expansion (NTE), the heat capacities of Zr 1- x M x W 2 O 8- y (M = Sc, Lu; x = 0.02, 0.04) at low temperatures were measured and analyzed. The analysis presents the effective phonon density of states (DOS) of β-ZrW 2 O 8 , showing a rounded form around 5 meV. The rounded phonon DOS of β-ZrW 2 O 8 is in marked contrast to that of the low-temperature phase of ZrW 2 O 8 , and their distinction is consistent with the difference in NTE nature between two structures.