NONVOLATILE SWITCHABLE JOSEPHSON JUNCTIONS
NONVOLATILE SWITCHABLE JOSEPHSON JUNCTIONS
复制标题
非易失性可切换约瑟夫森结
DOI：
10.1063/1.369298
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发表时间：
1999
影响因子：
3.2
通讯作者：
Mark Johnson
中科院分区：
文献类型：
--
作者：
T. Clinton;Mark Johnson
在一个简单的双层几何结构中，一个薄的微结构铁磁膜横跨一个超导条。铁磁体边缘的局部强边缘磁场会淬灭超导性，从而产生弱连接。通过控制铁磁体面内磁化的方向，可以在开和关之间改变弱连接的强度。Shapiro台阶的观察证实了“猝灭”状态下的交流约瑟夫森效应。在这种可切换的约瑟夫森结中，仅需要能量来改变状态，然后保持热力学平衡。
In a simple bilayer geometry, a thin, microstructured ferromagnetic film spans a superconducting strip. Locally strong magnetic fringe fields at the edge of the ferromagnet quench the superconductivity, creating a weak link. The strength of the weak link can be varied between on and off by controlling the orientation of the in-plane magnetization of the ferromagnet. The observation of Shapiro steps demonstrates the ac Josephson effect in the “quenched” state. In this switchable Josephson junction, energy is required only to change states, which are thereafter maintained in thermodynamic equilibrium.