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High-pressure and high-tem- perature synthesis of MgB2 and its superconductivity
  • 分类：O511.4[理学—低温物理;理学—物理]
  • 相关基金：This work was supported by the Outstanding Youth Fund of the National Natural Science Foundation of China (Grant No. 59725105) ; the Hundreds of Talents Program of the Chinese Academy of Sciences.
关键词： SUPERCONDUCTIVITY, MAGNETIZATION, resistance.
中文摘要：

The single-phase sample of MgB2 was prepared successfully at the temperature of 900℃ and under the pressure of 3 GPa. The structure of the sample was investigated using powder X-ray diffraction and Rietveld analysis. The results show that the structure of the sample belongs to the hexagonal structure with space group of P6/mmm, a=3.0861(5) A, c=3.5222(8) A. The magnetic and resistance measurements indicate that the superconducting transition temperature Tc is 39 K.

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