arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1007.2527cond-mat.supr-concond-mat.mes-hall
收藏

超导体-铁磁体混合体中的反畴超导电性:无涡旋通道对I-V特性对称性的影响

Reverse-domain superconductivity in superconductor-ferromagnet hybrids: effect of a vortex-free channel on the symmetry of I-V characteristics

A. Yu. Aladyshkin, D. Yu. Vodolazov, J. Fritzsche, R. B. G. Kramer, V. V. Moshchalkov

摘要:

实验证明,在铁磁BaFe_{12} O_{19}衬底上存在单畴壁会引起超导铝桥的电流(I)-电压(V)特性的不对称性。所观察到的二极管样效应,即极性相关的临界电流,与超导区域内的无涡流通道的形成有关,该通道增加了流过超导桥的总电流而没有耗散。无涡流区域仅在注入电流的特定符号和外部磁场的有限范围内出现。

英文摘要:

We demonstrate experimentally that the presence of a single domain wall in an underlying ferromagnetic BaFe_{12}O_{19} substrate can induce a considerable asymmetry in the current (I) - voltage (V) characteristics of a superconducting Al bridge. The observed diode-like effect, i.e. polarity-dependent critical current, is associated with the formation of a vortex-free channel inside the superconducting area which increases the total current flowing through the superconducting bridge without dissipation. The vortex-free region appears only for a certain sign of the injected current and for a limited range of the external magnetic field.

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。

↑