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Figure 9. Histograms for chip H7#43. Sometimes double peaks appear in the
threshold voltage. The distance between the peaks is defined as
Vt. Measurement taken at T=50 mK and f=57.6 Hz.
Figure 10. Chip H7#43. The distance between double peaks seems to vary with
magnetic field. Even though there are only a few points it is quite clear that
Vt depends on B. The magnetic field spans less
than one frustration and whether or not it is periodic is too early to tell.
The solid line is at 50 mK and the dashed line is at 75 mK.
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