Abstract
Trapped flux relaxation at the center of a single-domain Y-Ba-Cu-O superconductor upon pulsed field magnetization has been studied at T = 78 K. In the case of a weakly magnetized sample, the induction increases according to a logarithmic law and the creep rate (defined as S = −dlnB/dlnt) is negative. As the amplitude H a of the magnetizing field grows, the creep rate decreases, changes sign, passes through a maximum, and tends to zero. The nonmonotonic behavior of S(H a ) is explained by a nonuniform radial distribution of the temperature during the magnetization pulse.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
M. Tomita and M. Murakami, Nature 421, 517 (2003).
G. Krabbes et al., High Temperature Superconductor Bulk Materials (Wiley-VCH, 2006).
Y. Yeshurun, Rev. Mod. Phys. 68, 911 (1996).
Y. Itoh, Y. Yanagi, and U. Mizutani, J. Appl. Phys. 82, 5600 (1997).
D. Zola et al., Phys. Rev. B 70, 224 504 (2004).
N. A. Nizhelskiy et al., Supercond. Sci. Technol. 20, 81 (2007)
Y. Yanagi et al., Supercond. Sci. Technol. 18, 839 (2005).
H. Fujishiro et al., Jpn. J. Appl. Phys. 33, 4965 (1994).
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © A.A. Kartamyshev, E.P. Krasnoperov, Yu.D. Kuroedov, O.L. Polushchenko, N.A. Nizhelskiy, 2009, published in Pis’ma v Zhurnal Tekhnicheskoĭ Fiziki, 2009, Vol. 35, No. 17, pp. 26–33.
Rights and permissions
About this article
Cite this article
Kartamyshev, A.A., Krasnoperov, E.P., Kuroedov, Y.D. et al. Magnetic flux relaxation in a pulse-magnetized Y-Ba-Cu-O superconductor. Tech. Phys. Lett. 35, 796–799 (2009). https://doi.org/10.1134/S1063785009090041
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1063785009090041