Präparation und Supraleitungseigenschaften von Niobnitrid sowie Niobnitrid mit Titan-, Zirkon- und Tantalzusatz
Präparation und Supraleitungseigenschaften von Niobnitrid sowie Niobnitrid mit Titan-, Zirkon- und Tantalzusatz
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泰坦、锆石和 Tantalzusatz
DOI：
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发表时间：
1968
期刊：
影响因子：
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通讯作者：
E. Saur
中科院分区：
文献类型：
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作者：
G. Horn;E. Saur
描述了通过将氮气在压力下分别扩散到不含和含有钛、锆和钽混合物的铌丝中来制备不含和含有钛、锆和钽混合物的氮化铌样品。对于不同成分的纯氮化铌样品，研究了氮含量对超导转变温度的影响，结果表明，即使对于化学计量成分 NbN，转变温度也不超过 16.5 °K。这与其他作者相反。对于(Nb-Ti)Nx、(Nb-Zr)Nx 和(Nb-Ta)Nx 系统的扩散线，给出了分别作为钛、锆和钽混合物的函数的临界温度、晶格参数和氮含量。首次测量了氮化铌的磁化曲线，显示了 II 型超导体的行为。关于通过扩散形成氮化铌的动力学，在恒定氮气压力下，随着扩散温度的升高，氮含量增加，但在高温区域中氮含量减少。
A description of preparation for samples of niobium nitride without and with admixtures of titanium, zirconium and tantalum by diffusion of nitrogen under pressure into niobium wires without and with admixtures of titanium, zirconium and tantalum respectively, is given. For samples of pure niobium nitride with different compositions the influence of the nitrogen content on the transition temperature to superconductivity has been investigated with the result of a transition temperature not exceeding 16.5 °K even for the stoichiometric composition NbN. This is in contrary to other authors. For diffusion wires of the systems (Nb-Ti)Nx, (Nb-Zr)Nx and (Nb-Ta)Nx the critical temperature, lattice parameter and nitrogen content as a function of the admixture of titanium, zirconium and tantalum respectively, are given. For the first time the magnetisation curve of niobium nitride has been measured showing the behaviour of type II superconductors. Concerning the kinetics of formation of niobium nitride by diffusion the nitrogen content is increasing for constant nitrogen pressure with raising temperature of diffusion, but is decreasing in the high temperature region.