Magnetic-superconductor heterosturcture

The superconducting wave function penetrating inside the ferromagnet is modulated by the energy difference between the minority and majority spin bands. We demonstrated that interface resistance between a superconductor and a ferromagnet can be quantitatively analyzed by the current perpendicular to plane measurement techniques. The absolute values of the interface resistance can provide information of the spin accumulation, the Andreev reflection, and interfacial transparency. In the lateral superconductor-ferromagnet submicron junction, the dc and ac Josephson Effect was observed.

-S. Y. Huang, S. F. Lee, S. Y. Hsu, and Y. D. Yao, Interface resistance and transparency in ferromagnet/superconductor Co/NbxTi1−x multilayers (x=1, 0.6, and 0.4), Phys. Rev. B 76, 024521 (2007); Selected for the August 1, (2007) issue of Virtual Journal of Applications of Superconductivity.

 

-S. Y. Huang, J. J. Liang, S. Y. Hsu, L. K. Lin, T. C. Tsai, and S. F. Lee, High interfacial transparency in Cu0.5Ni0.5/Nb layered systems quantified by Current-Perpendicular-to-Plane resistance and superconducting properties, Eur. Phys. J. B 79, 153–162 (2011).

 

-L. K. Lin, S. Y. Huang, J. H. Huang, and S. F. Lee, Nb lateral Josephson junctions induced by a NiFe cross strip, Appl. Phys. Lett. 101,242601 (2012).