Physical Properties of MgB2 and its Potential as a Superconducting Material

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  • ＭｇＢ２超伝導体の性質とその可能性　　ＭｇＢ２の物理的性質と超伝導材料としての可能性
  • MgB2の物理的性質と超伝導材料としての可能性
  • MgB2 ノ ブツリテキ セイシツ ト チョウデンドウ ザイリョウ ト シテ ノ カノウセイ

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Abstract

The electronic state of an MgB2 superconductor is reviewed, focusing on its characteristic properties such as the multi-bands and multi-gaps. The presence of two superconducting gaps causes the temperature dependence of the anisotropy in the upper critical fields. The carbon impurities can be substituted for B and act as strong scattering centers, particularly for the σ-band carriers. The s-wave symmetry of the gaps is an advantage to achieve a higher critical current.

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