Výsledky vyhledávání - "Kayali, M. Amin"

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Theory of pinning in a Superconducting Thin Film Pierced by a Ferromagnetic Columnar Defect

Autor: Kayali, M. Amin

Publikováno v: Phys. Rev. B 71, 024515 (2005)

This is an analytical study of pinning and spontaneous vortex phase is a system consisting of a superconducting thin film pierced by a long ferromagnetic columnar defect of finite radius $R$. The magnetic fields, screening currents, energy and pinnin

Externí odkaz: http://arxiv.org/abs/cond-mat/0412136

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Dissipation and coherent effects in narrow superconducting channels

Autor: Kayali, M. Amin, Kogan, Vladimir G., Pokrovsky, Valery L.

Publikováno v: Phys. Rev. B 71, 024525 (2005)

We apply the time dependent Ginzburg-Landau equations (TDGL) to study small ac currents of frequency $\omega$ in superconducting channels narrow on the scale of London penetration depth. We show that TDGL have $t$-dependent and spatially uniform solu

Externí odkaz: http://arxiv.org/abs/cond-mat/0408215

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Hysteresis of Finite Arrays of Magnetic nano Dots

Autor: Kayali, M. Amin, Saslow, Wayne M.

Hysteresis curves for finite arrays of $N\times N$ ferromagnetic nano dots subject to the dipole-dipole interaction are investigated for $N=2... 13$. Spin arrangements up to N=6 are presented, which indicate the onset of bulk-like behavior associated

Externí odkaz: http://arxiv.org/abs/cond-mat/0310481

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Superconducting Vortices and Elliptical Ferromagnetic Textures

Autor: Kayali, M. Amin

Publikováno v: Phys. Rev. B 69, 012505 (2004)

In this article an analytical and numerical study of superconducting thin film with ferromagnetic textures of elliptical geometries in close proximity is presented. The screening currents induced in the superconductor due to the magnetic texture are

Externí odkaz: http://arxiv.org/abs/cond-mat/0309090

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Anisotropic Transport Properties of Ferromagnetic-Superconducting Bilayers

Autor: Kayali, M. Amin, Pokrovsky, Valery L.

Publikováno v: Phys. Rev. B 69, 132501 (2004)

We study the transport properties of vortex matter in a superconducting thin film separated by a thin insulator layer from a ferromagnetic layer. We assume an alternating stripe structure for both FM and SC layers as found in [7]. We calculate the pe

Externí odkaz: http://arxiv.org/abs/cond-mat/0303570

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Ferromagnetic Annulus And Superconducting Vortices

Autor: Kayali, M. Amin

Publikováno v: Physics Letters A 298 (2002) 432--436

The screening currents induced in a superconducting film by a magnetic annulus whose magnetization is perpendicular to the superconductor are calculated. We show that close to the superconductor transition temperature $T_c$ particular values of the m

Externí odkaz: http://arxiv.org/abs/cond-mat/0110328

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