Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Goa, P. E."'
Autor:
Vestgarden, J. I., Shantsev, D. V., Olsen, A. A. F., Galperin, Y. M., Yurchenko, V. V., Goa, P. E., Johansen, T. H.
Publikováno v:
Phys. Rev. Lett. 98, 117002 (2007)
Interaction between a Bloch wall in a ferrite-garnet film and a vortex in a superconductor is analyzed in the London approximation. Equilibrium distribution of vortices formed around the Bloch wall is calculated. The results agree quantitatively with
Externí odkaz:
http://arxiv.org/abs/cond-mat/0607043
Autor:
Denisov, D. V., Shantsev, D. V., Galperin, Y. M., Choi, Eun-Mi, Lee, Hyun-Sook, Lee, Sung-Ik, Bobyl, A. V., Goa, P. E., Olsen, A. A. F., Johansen, T. H.
Publikováno v:
Phys. Rev. Lett. 97, 077002 (2006)
We report a detailed comparison of experimental data and theoretical predictions for the dendritic flux instability, believed to be a generic behavior of type-II superconducting films. It is shown that a thermo-magnetic model published very recently
Externí odkaz:
http://arxiv.org/abs/cond-mat/0605425
Publikováno v:
Physica C 408-410, 537 (2004)
We observe single vortices as they penetrate the edge of a superconductor using a high-sensitivity magneto-optical microscope. The vortices leap across a gap near the edge, a distance that decreases with increasing applied field and sample thickness.
Externí odkaz:
http://arxiv.org/abs/cond-mat/0307248
Publikováno v:
Supercond. Sci. Technol. 16 (May 2003) 566-570
Magneto-optical imaging was used to study a zero-field-cooled MgB2 film at 9.6K where in a slowly increasing field the flux penetrates by abrupt formation of large dendritic structures. Simultaneously, a gradual flux penetration takes place, eventual
Externí odkaz:
http://arxiv.org/abs/cond-mat/0212404
Autor:
Barkov, F. L., Shantsev, D. V., Johansen, T. H., Goa, P. E., Kang, W. N., Kim, H. J., Choi, E. M., Lee, S. I.
Publikováno v:
Phys. Rev. B 67, 064513 (2003)
Using magneto-optical imaging the phenomenon of dendritic flux penetration in superconducting films was studied. Flux dendrites were abruptly formed in a 300 nm thick film of MgB2 by applying a perpendicular magnetic field. Detailed measurements of f
Externí odkaz:
http://arxiv.org/abs/cond-mat/0205361
Publikováno v:
Physical Review B, Volume 65, 132514 (2002)
The interaction between a magnetic thin film and a superconductor is studied. In particular, the equilibrium width of a Bloch wall is estimated with and without the superconductor. It is shown that the Bloch wall experiences a small shrinkage on cool
Externí odkaz:
http://arxiv.org/abs/cond-mat/0108475
Autor:
Johansen, T. H., Baziljevich, M., Shantsev, D. V., Goa, P. E., Galperin, Y. M., Kang, W. N., Kim, H. J., Choi, E. M., Kim, M. -S., Lee, S. I.
Publikováno v:
Supercond. Sci. Technol. 14, 726-728 (2001)
Magneto-opitcal studies of a c-oriented epitaxial MgB2 film with critical current density 10^7 A/cm^2 demonstrate a breakdown of the critical state at temperatures below 10 K [cond-mat/0104113]. Instead of conventional uniform and gradual flux penetr
Externí odkaz:
http://arxiv.org/abs/cond-mat/0108092
Autor:
Johansen, T. H., Baziljevich, M., Shantsev, D. V., Goa, P. E., Galperin, Y. M., Kang, W. N., Kim, H. J., Choi, E. M., Kim, M. -S., Lee, S. I.
Publikováno v:
Europhys. Lett. 59, No. 4, p.599-605 (2002)
Magneto-opitcal studies of a c-oriented epitaxial MgB2 film show that below 10 K the global penetration of vortices is dominated by complex dendritic structures abruptly entering the film. We suggest that the observed behavior is due to a thermo-magn
Externí odkaz:
http://arxiv.org/abs/cond-mat/0104113
Autor:
Fisher, L. M., Goa, P. E., Baziljevich, M., Johansen, T. H., Rakhmanov, A. L., Yampol'skii, V. A.
The macroturbulence instability observed in fluxline systems during remagnetization of superconductors is explained. It is shown that when a region with flux is invaded by antiflux the interface can become unstable if there is a relative tangential f
Externí odkaz:
http://arxiv.org/abs/cond-mat/0103058
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