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Title: Imaging the spontaneous formation of vortex-antivortex pairs in planar superconductor/ferromagnet hybrid structures.

Abstract

Low-temperature magnetic force microscopy has been used to visualize spontaneous formation of vortex-antivortex pairs in hybrid ferromagnet/superconductor systems. Vortex-antivortex pairs are induced by the periodic stray field of the ferromagnet. We find general equilibrium conditions for which spontaneous vortex-antivortex pairs are formed during zero-field cooling of the hybrid ferromagnet/superconductor bilayers. Vortices can be generated by the ferromagnet domains in the absence of an external field and they are thermodynamically stable for values of the stray field and the period of the stripe magnetic domains that exceed a certain threshold.

Authors:
; ; ; ; ; ; ; ;  [1];  [2];  [2];  [2]
  1. (Materials Science Division)
  2. (
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); Italian Ministry for Higher Education and Research
OSTI Identifier:
1020702
Report Number(s):
ANL/MSD/JA-70312
Journal ID: 1098-0121; TRN: US201116%%600
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Phys. Rev. B
Additional Journal Information:
Journal Volume: 84; Journal Issue: Jul. 7, 2011
Country of Publication:
United States
Language:
ENGLISH
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ATOMIC FORCE MICROSCOPY; MAGNETIC FIELDS; VORTICES; FERROMAGNETISM

Citation Formats

Iavarone, M., Scarfato, A., Bobba, F., Longobardi, M., Karapetrov, G., Novosad, V., Yefremenko, V., Giubileo, F., Cucolo, A. M., Univ. degli Studi di Salerno), Temple Univ.), and CNR-SPIN Lab.). Imaging the spontaneous formation of vortex-antivortex pairs in planar superconductor/ferromagnet hybrid structures.. United States: N. p., 2011. Web. doi:10.1103/PhysRevB.84.024506.
Iavarone, M., Scarfato, A., Bobba, F., Longobardi, M., Karapetrov, G., Novosad, V., Yefremenko, V., Giubileo, F., Cucolo, A. M., Univ. degli Studi di Salerno), Temple Univ.), & CNR-SPIN Lab.). Imaging the spontaneous formation of vortex-antivortex pairs in planar superconductor/ferromagnet hybrid structures.. United States. doi:10.1103/PhysRevB.84.024506.
Iavarone, M., Scarfato, A., Bobba, F., Longobardi, M., Karapetrov, G., Novosad, V., Yefremenko, V., Giubileo, F., Cucolo, A. M., Univ. degli Studi di Salerno), Temple Univ.), and CNR-SPIN Lab.). Thu . "Imaging the spontaneous formation of vortex-antivortex pairs in planar superconductor/ferromagnet hybrid structures.". United States. doi:10.1103/PhysRevB.84.024506.
@article{osti_1020702,
title = {Imaging the spontaneous formation of vortex-antivortex pairs in planar superconductor/ferromagnet hybrid structures.},
author = {Iavarone, M. and Scarfato, A. and Bobba, F. and Longobardi, M. and Karapetrov, G. and Novosad, V. and Yefremenko, V. and Giubileo, F. and Cucolo, A. M. and Univ. degli Studi di Salerno) and Temple Univ.) and CNR-SPIN Lab.)},
abstractNote = {Low-temperature magnetic force microscopy has been used to visualize spontaneous formation of vortex-antivortex pairs in hybrid ferromagnet/superconductor systems. Vortex-antivortex pairs are induced by the periodic stray field of the ferromagnet. We find general equilibrium conditions for which spontaneous vortex-antivortex pairs are formed during zero-field cooling of the hybrid ferromagnet/superconductor bilayers. Vortices can be generated by the ferromagnet domains in the absence of an external field and they are thermodynamically stable for values of the stray field and the period of the stripe magnetic domains that exceed a certain threshold.},
doi = {10.1103/PhysRevB.84.024506},
journal = {Phys. Rev. B},
number = Jul. 7, 2011,
volume = 84,
place = {United States},
year = {2011},
month = {7}
}