Abstract
We have performed measurements of the complex magnetic ac susceptibility of superconducting compacted platinum powders at temperatures 0.1≲T≲10 mK with different ac excitation frequencies in the interval 5 Hz≲ω/2π≲10 kHz and with different excitation field amplitudes at 0.006≲bAC≲2 μT. The dependence of the ac susceptibility on the excitation field amplitude permits to determine the intergranular critical current density jc whereas the frequency dependence reflects the flux dynamics. By comparing the experimental results with theoretical predictions we identify flux flow, flux pinning and flux creep effects in the regimes of intra- and intergranular superconductivity. The possible impact of these effects on the superconducting parameters like jc of the samples is discussed.
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REFERENCES
R. König, A. Schindler, and T. Herrmannsdörfer, Phys. Rev. Lett. 82, 4528 (1999).
W. Wendler, T. Herrmannsdörfer, S. Rehmann, and F. Pobell, Europhys. Lett. 38, 619 (1997).
A. Schindler, R. König, T. Herrmannsdörfer, and H. F. Braun, Phys. Rev. B 62, 14350 (2000).
F. Gömöry, Supercond. Sci. Technol. 10, 523 (1997).
Y. B. Kim and M. J. Stephen, in Superconductivity, Vol. 2, edited by R. D. Parks (Marcel Dekker, New York, 1969), p. 1107.
P. H. Kes, J. Aarts, J. van den Berg, C. J. van der Beek, and J. A. Mydosh, Supercond. Sci. Technol. 1, 242 (1989).
A. M. Campbell, J. Phys. C 4, 3186 (1971).
A. M. Campbell, in Magnetic Susceptibility of Superconductors and Other Spin Systems, edited by R. A. Hein, T. L. Francavilla and D. H. Liebenberg (Plenum Press, New York, 1991), p. 129.
E. H. Brandt, Phys. Rev. Lett. 67, 2219 (1991).
C. P. Bean, Phys. Rev. Lett. 8, 250 (1962); Rev. Mod. Phys. 36, 31 (1964).
Y. B. Kim, C. F. Hempstead, and A. R. Strnad, Phys. Rev. Lett. 9, 306 (1962); Phys. Rev. 129, 528 (1963).
P. W. Anderson, Phys. Rev. Lett. 9, 309 (1962).
M. Tinkham, Introduction to Superconductivity, 2nd edition, (McGraw-Hill, New York, 1996).
K. Gloos, P. Smeibidl, C. Kennedy, A. Singsaas, P. Sekowski, R. M. Mueller, and F. Pobell, J. Low Temp. Phys. 73, 101 (1988).
R. B. Goldfarb, M. Lelental, and C. A. Thompson, in Magnetic Susceptibility of Superconductors and Other Spin Systems, T. L. Francavilla and D. H. Liebenberg (Plenum Press, New York, 1991) (see Ref. [8]), p. 49.
D.-X. Chen, J. A. Brug, and R. B. Goldfarb, IEEE Trans. Magn. 27, 3601 (1991).
R. J. Soulen and R. B. Dove, SRM 768, special publication of the National Bureau of Standards (NBS) 260, (1979).
R. König, A. Schindler, T. Herrmannsdörfer, and H. F. Braun, in Adv. in Solid State Physics, Vol. 40, edited by B. Kramer (Vieweg, Braunschweig, 2000), p. 729.
T. Herrmannsdörfer, S. Rehmann, and F. Pobell, J. Low Temp. Phys. 104, 67 (1996).
R. A. Hein, Phys. Rev. B 33, 7539 (1986).
E. H. Brandt, Z. Phys. B 80, 167 (1990).
V. B. Geshkenbein, V. M. Vinokur, and R. Fehrenbacher, Phys. Rev. B 43, 3748 (1991).
Z. Marohnic and E. Babic, in Magnetic Susceptibility of Superconductors and Other Spin Systems, T. L. Francavilla and D. H. Liebenberg (Plenum Press, New York, 1991) (see Ref. [8]), p. 267.
M. J. Qin and X. X. Yao, Phys. Rev. B 54, 7536 (1996).
C. P. Bean and J. D. Livingston, Phys. Rev. Lett. 12, 14 (1964).
T. T. M. Palstra, B. Batlogg, R. B. van Dover, L. F. Schneemeyer, and J. V. Waszczak, Phys. Rev. B 41, 6621 (1990).
M. Tinkham, Helv. Phys. Acta 61, 443 (1988).
J. R. Clem, Physica C 153, 50 (1988).
A. Kunold, M. Hernandez, A. Myszkowski, J. L. Cardoso, and P. Pereyra, preprint (2000), http://xxx.lanl.gov/abs/cond-mat/0009429.
T. Wolf and A. Majhofer, Phys. Rev. B 47, 5383 (1993).
S. R. Curras, J. A. Veira, J. Maza, and F. Vidal, Supercond. Sci. Technol. 13, 1005 (2000).
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Schindler, A., König, R., Herrmannsdörfer, T. et al. Flux Dynamics Effects in Superconducting Compacted Platinum Powders. Journal of Low Temperature Physics 124, 245–255 (2001). https://doi.org/10.1023/A:1017538204585
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DOI: https://doi.org/10.1023/A:1017538204585