Session Y34: Superconducting Devices and Applications
8:00 AM–11:00 AM, Friday, March 20, 2009
Room: 404
Sponsoring Unit:
DCMP
Chair: Galen O'Neil and Robert Horansky, National Institute of Standards and Technology
Abstract ID: BAPS.2009.MAR.Y34.6
Abstract: Y34.00006 : Measurements of a YBCO superconducting quantum interference filter with planar ion-damaged Josephson junctions
9:00 AM–9:12 AM
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Abstract 
Authors:
Steven M. Anton
(University of California, Berkeley)
Shane A. Cybart
(University of California, Berkeley)
Stephen M. Wu
(University of California, Berkeley)
John Clarke
(University of California, Berkeley)
R.C. Dynes
(University of California, Berkeley)
We have fabricated a two dimensional series-parallel array of 565 $\times$28 \linebreak YBa$_2$Cu$_3$O$_{7-\delta}$ thin film ion damage Josephson junctions. The loop areas were varied incommensurately from 28.5 to 90~$\mu$m$^2$ so that the response of the current-biased array to an applied magnetic field is a prominent peak in voltage centered at zero field. We measured voltage versus applied magnetic field characteristics for several static bias currents at different temperatures. Additionally, we measured current-voltage ($I$-$V$) characteristics of the array with no applied magnetic field at several temperatures. To fit the $I$-$V$ characteristics, we assumed that each parallel section of the array could be modeled as a single resistively shunted junction with critical currents following a normal distribution. Fitting the summed voltage contributions of the parallel sections to measurements of the array, we computed the resistance and critical current mean and spread. The standard deviation of these critical currents was 15~percent at 74~K.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2009.MAR.Y34.6