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arXiv 0910.5907cond-mat.supr-concond-mat.other
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0-π SIFS约瑟夫森结中的磁干涉图样:0和π区之间不对称性的影响

Magnetic interference patterns in 0-Pi SIFS Josephson junctions: effects of asymmetry between 0 and Pi regions

M. Kemmler, M. Weides, M. Weiler, M. Opel, S. T. B. Goennenwein, A. S. Vasenko, A. A. Golubov, H. Kohlstedt, D. Koelle, R. Kleiner, E. Goldobin

摘要:

本文详细分析了0、π和0-π超导体-绝缘体-铁磁体-超导体约瑟夫森结的临界电流I_c与磁场B的关系。0和Pi结的I_c(B)符合Fraunhofer模式,表明临界电流密度j_c(x)是均匀的。I_c(B)的最大值沿场轴略有偏移,表明F层沿场轴的面内磁化强度较小。0-Pi结的I_c(B)呈现特征中心极小值。然而,由于j_c在0和Pi部分中的不对称性,I_c在这里具有有限值。此外,该I_c(B)具有不对称的极大值和凸点极小值。为了详细解释这些特征,需要考虑在0部分和Pi部分中不同的通量穿透。我们讨论这种不对称性的F-层的磁性和制造技术用于生产0-Pi结。

英文摘要:

We present a detailed analysis of the dependence of the critical current I_c on the magnetic field B of 0, Pi, and 0-Pi superconductor-insulator-ferromagnet-superconductor Josephson junctions. I_c(B) of the 0 and Pi junction closely follows a Fraunhofer pattern, indicating a homogeneous critical current density j_c(x). The maximum of I_c(B) is slightly shifted along the field axis, pointing to a small remanent in-plane magnetization of the F-layer along the field axis. I_c(B) of the 0-Pi junction exhibits the characteristic central minimum. I_c however has a finite value here, due to an asymmetry of j_c in the 0 and Pi part. In addition, this I_c(B) exhibits asymmetric maxima and bumped minima. To explain these features in detail, flux penetration being different in the 0 part and the Pi part needs to be taken into account. We discuss this asymmetry in relation to the magnetic properties of the F-layer and the fabrication technique used to produce the 0-Pi junctions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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