High-T C superconductor-normal metal-superconductor Josephson microbridges with high-resistance normal metal links

Applied Physics Letters - Tập 59 Số 9 - Trang 1126-1128 - 1991
R.H. Ono1, J. A. Beall1, M. W. Cromar1, Todd E. Harvey1, M.E. Johansson1, C. D. Reintsema1, D. A. Rudman1
1Electromagnetic Technology Division, National Institute of Standards and Technology, Boulder, Colorado 80303

Tóm tắt

We have developed an in situ process for fabricating high transition temperature superconductor-normal metal-superconductor microbridges using a step edge to define the normal metal length. Critical current-normal resistance products over 1 mV have been measured at low temperature in devices with high-resistivity Ag-Au alloy bridges. Results on samples with Ag bridges are compared with the alloy data as an initial test of recent theories of SNS Josephson junctions. Josephson effects have been demonstrated in these devices at temperatures higher than 80 K. Clearly defined rf steps have been observed, with power dependence qualitatively similar to theoretical predictions.

Từ khóa


Tài liệu tham khảo

1991, Appl. Phys. Lett., 58, 543, 10.1063/1.104581

1991, Appl. Phys. Lett., 58, 634, 10.1063/1.104552

1991, Appl. Phys. Lett., 58, 753, 10.1063/1.104537

1989, IEEE Trans. Magn., MAG-25, 1298

1991, Appl. Phys. Lett., 58, 2552, 10.1063/1.105231

1979, Rev. Mod. Phys., 51, 101, 10.1103/RevModPhys.51.101

1991, IEEE Trans. Magn., 27, 2460, 10.1109/20.133717

1983, Appl. Phys. Lett., 42, 541, 10.1063/1.93998

1991, IEEE Trans. Magn., 27, 3106, 10.1109/20.133868

1990, Appl. Phys. Lett., 57, 1152, 10.1063/1.103517

1971, Radio Eng. Electron. Phys., 16, 1917

Thông tin
Thông tin xuất bản

Applied Physics Letters

Tập 59 Số 9

1126-1128

Thông tin tác giả