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摘要: 用四点电极法及磁控溅射结合光刻集成电极的方法,测量了铁在25 GPa压力下的电阻随压力的变化;用微区X射线衍射仪原位测量了铁在25 GPa压力下晶胞参数随压力的变化关系。实验结果表明,铁在13.7 GPa时发生相变,由体心立方相转变为六方密堆相,在18.1 GPa时相变结束。利用高压下铁的电阻数据,结合X射线衍射结果,推导出铁的电导率随压力的变化关系。Abstract: Four electrodes method and the magnetic sputter film deposition technique combined with photolithographic shaping method are used to measure the electrical resistance of iron up to 25 GPa. Furthermore, in-situ high pressure X-ray diffraction experiment was performed for measuring the lattice parameters of iron under high pressures up to 25 GPa. The experimental results indicated that the process of bcc-hcp phase transition of iron initiated at 13.7 GPa and finished at 18.1 GPa. The pressure dependence of electrical conductivity of iron was finally deduced from the resistance data and the X-ray diffraction results.
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Key words:
- iron /
- electrical conductivity /
- DAC high pressure /
- X-ray diffraction
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