Zobrazeno 1 - 10
of 96
pro vyhledávání: '"Shantsev, D. V."'
Publikováno v:
Supercond. Sci. Technol. 26, 055012 (2013)
The variety of morphologies in flux patterns created by thermomagnetic dendritic avalanches in type-II superconducting films is investigated using numerical simulations. The avalanches are triggered by introducing a hot spot at the edge of a strip-sh
Externí odkaz:
http://arxiv.org/abs/1212.3412
Autor:
Yurchenko, V. V., Qviller, A. J., Chaudhuri, S., Maasilta, I. J., Shantsev, D. V., Galperin, Y. M., Johansen, T. H.
Thermo-magnetic instability (TMI) in superconductors is known to destroy the critical state via magnetic flux avalanches, and hence it deteriorates the ability of the superconductors to shield external magnetic field. In this work, we quantify to wha
Externí odkaz:
http://arxiv.org/abs/1211.3787
Publikováno v:
Phys. Rev. B, 84, 054537 (2011)
We develop a fast numerical procedure for analysis of nonlinear and nonlocal electrodynamics of type-II superconducting films in transverse magnetic fields taking into account realistic boundary conditions. Using this procedure we explore stability o
Externí odkaz:
http://arxiv.org/abs/1012.4297
Publikováno v:
Phys. Rev. B 77, 014521 (2008)
Flux penetration into type-II superconducing films is simulated for transverse applied magnetic field and flux creep dynamics. The films contain macroscopic, non-conducting holes and we suggest a new method to introduce the holes in the simulation fo
Externí odkaz:
http://arxiv.org/abs/0709.4346
The distributions of electrical current and magnetic field in a thin-film superconductor ring is calculated by solving the London equation. The maximum amount of flux trapped by the hole, the fluxoid saturation number, is obtained by limiting the cur
Externí odkaz:
http://arxiv.org/abs/0709.1086
Publikováno v:
Phys. Rev. B 76, 174509 (2007)
The flux penetration near a semicircular indentation at the edge of a thin superconducting strip placed in a transverse magnetic field is investigated. The flux front distortion due to the indentation is calculated numerically by solving the Maxwell
Externí odkaz:
http://arxiv.org/abs/0706.0631
Autor:
Yurchenko, V. V., Shantsev, D. V., Nevala, M. R., Maasilta, I. J., Senapati, K., Budhani, R. C., Johansen, T. H.
We propose a mechanism responsible for the abrupt vanishing of the dendritic flux instability found in many superconducting films when an increasing magnetic field is applied. The onset of flux avalanches and the subsequent reentrance of stability in
Externí odkaz:
http://arxiv.org/abs/cond-mat/0702683
Autor:
Yurchenko, V. V., Shantsev, D. V., Galperin, Y. M., Alamgir, A. K. M., Han, Z., Johansen, T. H.
An increase in the critical current and suppression of AC losses in superconducting wires and tapes with soft magnetic sheath have been predicted theoretically and confirmed experimentally. In this work we present the results of magneto-optical inves
Externí odkaz:
http://arxiv.org/abs/cond-mat/0607065
Autor:
Albrecht, J., Matveev, A. T., Strempfer, J., Habermeier, H. -U., Shantsev, D. V., Galperin, Y. M., Johansen, T. H.
Publikováno v:
Phys. Rev. Lett. 98, 117001 (2007)
Anisotropic penetration of magnetic flux in MgB2 films grown on vicinal sapphire substrates is investigated using magneto-optical imaging. Regular penetration above 10 K proceeds more easily along the substrate surface steps, anisotropy of the critic
Externí odkaz:
http://arxiv.org/abs/cond-mat/0607063
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