skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Transverse instabilities of multiple vortex chains in superconductor-ferromagnet bilayers.

Abstract

Using scanning tunneling microscopy and Ginzburg-Landau simulations, we explore vortex configurations in magnetically coupled NbSe{sub 2}/permalloy superconductor/ferromagnet bilayer. The permalloy film with stripe domain structure induces periodic local magnetic induction in the superconductor, creating a series of pinning-antipinning channels for externally added magnetic flux quanta. Such laterally confined Abrikosov vortices form quasi-one-dimensional arrays (chains). The transitions between multichain states occur through propagation of kinks at the intermediate fields. At high fields we show that the system becomes nonlinear due to a change in both the number of vortices and the confining potential. The longitudinal instabilities of the resulting vortex structures lead to vortices 'levitating' in the antipinning channels.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
983464
Report Number(s):
ANL/MSD/JA-64233
Journal ID: 1098-0121; TRN: US201014%%493
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Phys. Rev. B
Additional Journal Information:
Journal Volume: 80; Journal Issue: 2009
Country of Publication:
United States
Language:
ENGLISH
Subject:
36 MATERIALS SCIENCE; CHAINS; DOMAIN STRUCTURE; INDUCTION; MAGNETIC FLUX; PERMALLOY; SCANNING TUNNELING MICROSCOPY; VORTICES

Citation Formats

Karapetrov, G, Milosevic, M V, Iavarone, M, Fedor, J, Belkin, A, Novosad, V, Peeters, F M, Materials Science Division, Univ. Antwerpen, Sci, Slovak Acad, and Illinois Inst. Tech. Transverse instabilities of multiple vortex chains in superconductor-ferromagnet bilayers.. United States: N. p., 2009. Web. doi:10.1103/PhysRevB.80.180506.
Karapetrov, G, Milosevic, M V, Iavarone, M, Fedor, J, Belkin, A, Novosad, V, Peeters, F M, Materials Science Division, Univ. Antwerpen, Sci, Slovak Acad, & Illinois Inst. Tech. Transverse instabilities of multiple vortex chains in superconductor-ferromagnet bilayers.. United States. doi:10.1103/PhysRevB.80.180506.
Karapetrov, G, Milosevic, M V, Iavarone, M, Fedor, J, Belkin, A, Novosad, V, Peeters, F M, Materials Science Division, Univ. Antwerpen, Sci, Slovak Acad, and Illinois Inst. Tech. Thu . "Transverse instabilities of multiple vortex chains in superconductor-ferromagnet bilayers.". United States. doi:10.1103/PhysRevB.80.180506.
@article{osti_983464,
title = {Transverse instabilities of multiple vortex chains in superconductor-ferromagnet bilayers.},
author = {Karapetrov, G and Milosevic, M V and Iavarone, M and Fedor, J and Belkin, A and Novosad, V and Peeters, F M and Materials Science Division and Univ. Antwerpen and Sci, Slovak Acad and Illinois Inst. Tech.},
abstractNote = {Using scanning tunneling microscopy and Ginzburg-Landau simulations, we explore vortex configurations in magnetically coupled NbSe{sub 2}/permalloy superconductor/ferromagnet bilayer. The permalloy film with stripe domain structure induces periodic local magnetic induction in the superconductor, creating a series of pinning-antipinning channels for externally added magnetic flux quanta. Such laterally confined Abrikosov vortices form quasi-one-dimensional arrays (chains). The transitions between multichain states occur through propagation of kinks at the intermediate fields. At high fields we show that the system becomes nonlinear due to a change in both the number of vortices and the confining potential. The longitudinal instabilities of the resulting vortex structures lead to vortices 'levitating' in the antipinning channels.},
doi = {10.1103/PhysRevB.80.180506},
journal = {Phys. Rev. B},
number = 2009,
volume = 80,
place = {United States},
year = {2009},
month = {1}
}