By Parson A. L.
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Extra resources for A Highly Sensitive Electrometer(en)(2s)
Therefore, the minimum value of the critical current density in the ﬂux bundle row, which is denoted by Jcm , becomes zero. While T < Tp the value of Jcm is positive since the locally depinned clusters are still pinned by the surrounding pinned clusters. When T > Tp , the sign of Jcm apparently becomes negative. This indicates that the thermally depinned clusters have already percolated even in the limit of J → 0, and therefore linear resistivity will be induced due to the localized ﬂux ﬂow along the percolation path in the limit of J → 0.
9, Ls = 100 pH, Lp = 5 nH were used . 4 mm2 . Therefore, the longdistance motion of vortices in the GBJ may cause a slight increase in the low frequency ﬁeld noise when a ﬁeld change of threshold is applied. 5 µT) slightly above the threshold increases the low frequency noise more than an order of magnitude (see Fig. 25a). It is implied from (50) that the ﬂux noise of the magnetometer increases as w is reduced. When w is comparable to or smaller than the hopping distance of vortices in the GBJ, it is likely that the vortices can pass across its width, driven by the Lorentz force of screening current, causing a strong low frequency noise.
Rev. Lett. 9, 309 (1962) P. W. Anderson, Y. B. Kim: Rev. Mod. Phys. 36, 39 (1964) 10, 16 12. P. H. Kess, J. Aarts, J. van den Berg, C. J. van der Beek, J. A. Mydosh: Supercond. Sci. Technol. 1, 242 (1989) 10, 16 13. C. Caroli, P. G. de Gennes, J. Matricon: Phys. Lett. 9, 307 (1964) 10 14. H. F. Hess, R. B. Robinson, R. C. Dynes, J. M. Valles, J. V. Waszczak: Phys. Rev. Lett. 62, 214 (1989) 10, 11 15. For a review, M. Golosovsky, M. Tsindlekht, D. Davidov: Supercond. Sci. Technol. 9, 1 (1996) 10, 21 16.
A Highly Sensitive Electrometer(en)(2s) by Parson A. L.