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首页> 外文期刊>Solid State Communications >High elastic modulus in b-axis-oriented single crystal V_2O_5
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High elastic modulus in b-axis-oriented single crystal V_2O_5

机译：b轴取向单晶V_2O_5中的高弹性模量

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摘要

The elastic moduli of V_2O_5 are of great importance for the assessment of the buildup of strain during thin-film growth as well as for the analysis of defect generation and propagation. The usually rather small crystal dimensions make a precise experimental determination of the elastic constants highly challenging and only very little is known about the temperature dependent strain evolution. Here large V_2O_5 single crystals grown with different parameter sets are investigated by ultrasonic pulse experiments and by sampled continuous wave ultrasound spectroscopy. The elastic modulus C_(22) is determined to be 220 GPa at room temperature. Temperature dependent investigations of the elastic behavior show that ultrasonic experiments are suitable for highly sensitive detection of oxygen-deficient phases in rapidly grown samples. In addition they indicate the presence of temperature dependent elastic instabilities in inhomogeneous samples.
机译：V_2O_5的弹性模量对于评估薄膜生长过程中应变的累积以及分析缺陷的产生和传播非常重要。通常较小的晶体尺寸很难精确地实验确定弹性常数，因此对温度相关的应变演化知之甚少。在这里，通过超声脉冲实验和采样连续波超声光谱法研究了具有不同参数集的大V_2O_5单晶。室温下的弹性模量C_（22）被确定为220GPa。取决于温度的弹性行为研究表明，超声实验适用于快速增长的样品中氧敏感相的高灵敏度检测。另外，它们表明在不均匀样品中存在温度依赖性弹性不稳定性。

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