Determination of the phase boundary of the ferroelastic rutile to CaCl2transition in RuO2usingin situhigh-pressure and high-temperature Raman spectroscopy
Determination of the phase boundary of the ferroelastic rutile to CaCl2transition in RuO2usingin situhigh-pressure and high-temperature Raman spectroscopy
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DOI：
10.1103/physrevb.84.054114
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发表时间：
2011-08
影响因子：
3.7
通讯作者：
S. Ono;K. Mibe
中科院分区：
文献类型：
--
作者：
S. Ono;K. Mibe
利用热液金刚石砧池（HTDAC）技术，利用拉曼散射光谱研究了ruo在压力为31 GPa、温度为1000 K下的高压行为。证实了从金红石型结构到cacl型结构的铁弹性转变。在过渡压力下观察到金红石型结构中的模态分裂为ccl型结构中的能带b模态。证实了金红石型和cacl型结构之间各拉曼模式的压力依赖关系的变化。这种转变具有正的dPdT梯度，这与其他aoo研究报告的结果一致。过渡边界为P (GPa)5.90.0056 × T (K)。
The high-pressure behavior of RuOhas been examined using Raman-scattering spectroscopy to a pressure of 31 GPa and a temperature of 1000 K employing a hydrothermal diamond anvil cell (HTDAC) technique. The ferroelastic transition from the rutile- to the CaCl-type structure was confirmed. A split of the Emode in the rutile-type structure to the Band Bmodes in the CaCl-type structure was observed at the transition pressure. A change in the pressure dependence of each Raman mode between the rutile- and the CaCl-type structure was confirmed. The transition has a positive dPdT gradient, which is consistent with those reported in other AOstudies. The transition boundary was determined to be P (GPa)5.90.0056 × T (K).