论文部分内容阅读
本文建立了一个利用金刚石对顶砧超高压装置测量金属高压电阻变化率的实验方法,并用这种方法研究了锰铜的高压电阻变化率,压力达18.5GPa。实验表明:在低于13GPa的压力范围内,锰铜电阻随压力的变化呈一线性关系,在13—18.5GPa的压力范围内则是另一线性关系。在13GPa附近,出现一个线性关系的“转折点”。在“转折点”以下我们测得的压阻系数为0.024GPa~(-1)与Barsis和Kume以及苏昉等人最新给出的结果都符合得很好。在“转折点”以上,需用新的线性关系来描述,对应的压阻系数为0.020GPa~(-1)。
In this paper, an experimental method for measuring the rate of change of metal high-voltage resistance by using a diamond anvil-top ultra-high pressure device was established. The rate of change of high-voltage resistance of manganese-copper was studied by this method. The pressure reached 18.5GPa. The experimental results show that there is a linear relationship between the resistance of Mn and Cu and the pressure in the pressure range below 13 GPa, and another linear relationship in the pressure range of 13-18.5 GPa. Near 13 GPa, there was a “turning point” in a linear relationship. Below the “turning point” we measured a piezoresistive coefficient of 0.024 GPa -1 in good agreement with the latest results given by Barsis and Kume and by Su et al. Above the “turning point”, a new linear relationship is required to describe the corresponding piezoresistive coefficient of 0.020 GPa -1.