Physics – Condensed Matter – Superconductivity
Scientific paper
2002-10-02
Appl. Phys. Lett. 82, 1893-1895 (2003).
Physics
Condensed Matter
Superconductivity
4pages, 4figures
Scientific paper
10.1063/1.1561152
We have developed a near-field microwave microscope to locally excite a superconducting film and measure second and third harmonic responses at microwave frequencies. We study the local nonlinear response of a YBa$_2$Cu$_3$O$_{7-d}$ thin film grown on a bi-crystal SrTiO$_3$ substrate. The location of the bi-crystal grain boundary is clearly identified by the microscope through higher harmonic response, and the spatial resolution is on the order of the magnetic loop probe size, about 500$\mu m$. The harmonic power and spatial resolution are successfully modeled with a one-dimensional extended Josephson junction simulation. From the model, the 2nd order harmonic response is dominated by Josephson vortex generation and flow. A geometry-free nonlinear scaling current density $J_{NL}\simeq 10^4\sim 10^5 A/cm^2$ is also exstracted from the data, indicating that the grain boundary weak link is the dominant nonlinear source in this case.
Anlage Steven M.
Lee Sheng-Chiang
No associations
LandOfFree
Spatially Resolved Nonlinearity Measurements of YBa$_2$Cu$_3$O$_{7-d}$ Bi-crystal Grain Boundaries does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Spatially Resolved Nonlinearity Measurements of YBa$_2$Cu$_3$O$_{7-d}$ Bi-crystal Grain Boundaries, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spatially Resolved Nonlinearity Measurements of YBa$_2$Cu$_3$O$_{7-d}$ Bi-crystal Grain Boundaries will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-164932