Preparation and Characterization of the New Superconductor MgB_(2)

孙玉平; 宋文海; 戴建明; 吴兴才; 王开友; 赵兵; 肖宏; 杜家驹; 闻海虎; 赵忠贤

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Preparation and Characterization of the New Superconductor MgB_(2)

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Polycrystalline samples of the new superconductor MgB_(2) are prepared by solid state reaction using Mg and B powders.The resistance measurement shows that the onset transition temperature and zero resistance transition temperature are Tonsetc=43.8 K and Tc0=37 K,respectively.The Tc0 depends on measuring current strongly.The diamagnetic transition temperature of~38 K is obtained by the ac susceptibility measurement.X-ray powder diffraction spectra of MgB_(2) can be indexed using hexagonal structure with space group P6/mmm and lattice parameters a=0.30864 and c=0.35212 nm.A second phase,probably MgO,is also found.

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《中国物理快报：英文版》 |2001年第4期|587-588|共2页
作者
孙玉平; 宋文海; 戴建明; 吴兴才; 王开友; 赵兵; 肖宏; 杜家驹; 闻海虎; 赵忠贤;
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作者单位

Laboratory of Internal Friction and Defects in Solids;

Institute of Solid State Physics;

Chinese Academy of Sciences;

Hefei 230031;

Laboratory of Internal Friction and Defects in Solids;

National High Magnetic Field Laboratory;

Hefei 230031;

National Laboratory for Superconductivity;

Institute of Physics and Centre for Condensed Matter Physics;

Chinese Academy of Sciences;

Beijing 100080;

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原文格式 PDF
正文语种 chi
中图分类金属学与热处理;
关键词
resistance; transition; Superconductor;

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Preparation and Characterization of the New Superconductor MgB_(2)

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