Superconductor—Ferromagnet—Superconductor π-junctions
Superconductor—Ferromagnet—Superconductor π-junctions
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超导体—铁磁体—超导体π结
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
A. Feofanov
中科院分区：
文献类型：
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作者：
V. Ryazanov;V. Oboznov;A. Prokofiev;V. Bolginov;A. Feofanov
对超导体-铁磁-超导体π结进行了实验研究。发现温度降低或铁磁夹层厚度增加导致了向π态的转变和向传统的0态的转变。研究了临界电流对厚度的依赖关系，观察到了非单调行为。还考察了SF-双层膜上的SF-邻近效应。结果表明，由于铁磁体中感应超导序参数的空间振荡，当铁磁层厚度接近振荡周期的四分之一时，SF双层膜的临界温度有一个最小值。PAC数：74.50+r，85.25.Cp.
Superconductor—ferromagnet—superconductor (SFS) π- junctions1 were investigated experimentally. The transitions to π-state and back to the conventional 0-state were found to result from temperature decrease or ferromagnetic interlayer thickness increase. Thickness dependence of the critical current was studied and nonmonotonic behavior was observed. The SF-proximity effect was also examined on SF-bilayers. It is shown that, due to the spatial oscillations of the induced superconducting order parameter in the ferromagnet, the critical temperature of the SF-bilayer has a minimum when the thickness of the ferromagnetic layer is close to a quarter of the oscillation period. PACS numbers: 74.50.+r, 85.25.Cp.