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Mg_1+xB₂材料的制备及其超导电性研究

Study on Preparation and Superconductivity of Mg_1+xB₂

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【Author】 WANG Hong-tao,CHENG Xin-hong,CHEN Zhang-zhang,LING Yin-hai (Department of Physics and Electronic Information Science, Wenzhou Normal College,Wenzhou 325027,China)

【机构】温州师范学院物理与电子信息学院；温州师范学院物理与电子信息学院浙江温州　325027；浙江温州　325027；浙江温州　325027；

【摘要】利用固相反应法制备了Mg1+xB2(x=0,0.1,0.2)超导体。粉末X射线衍射(XRD)表明过量Mg极易导致绝缘的MgB6和MgO杂相,Mg在MgB2中的固溶度很小,正常态电阻率随Mg过量增加而迅速增大。更多还原

【Abstract】 Nonstoichiometric binary metal diboride superconductors Mg_1+xB₂ （x=0,0.1, 0.2） are prepared by solid state reaction method. The powder X-ray diffraction patterns indicate that the excess amount of Mg lead easily to the insulating MgB₆ and MgO impurities and the solubility of Mg in MgB₂ is limited. The resistivity in normal state increases rapidly with increasing x.更多还原