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Title: Magnetic pinning in superconductor-ferromagnet multilayers

Abstract

We argue that superconductor/ferromagnet multilayers of nanoscale period should exhibit strong pinning of vortices by the magnetic domain structure in magnetic fields below the coercive field when ferromagnetic layers exhibit strong perpendicular magnetic anisotropy. The estimated maximum magnetic pinning energy for single vortex in such a system is about 100 times larger than the pinning energy by columnar defects. This pinning energy may provide critical currents as high as 10{sup 6}-10{sup 7} A/cm{sup 2} at high temperatures (but not very close to T{sub c}) at least in magnetic fields below 0.1 T. (c) 2000 American Institute of Physics.

Authors:
 [1];  [2];  [3];  [4]
  1. Department of Physics and Astronomy, CUNY Lehman College 250 Bedford Park Boulevard West, Bronx, New York 10468-1589 (United States)
  2. (United States)
  3. Department of Physics and Astronomy, CUNY Lehman College, 250 Bedford Park Boulevard West, Bronx, New York 10468-1589 (United States)
  4. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
Publication Date:
OSTI Identifier:
20216179
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 76; Journal Issue: 18; Other Information: PBD: 1 May 2000; Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; SUPERCONDUCTING FILMS; FERROMAGNETIC MATERIALS; MAGNETIC FLUX; VORTICES; CRITICAL CURRENT; HIGH-TC SUPERCONDUCTORS; COERCIVE FORCE; DOMAIN STRUCTURE; THEORETICAL DATA

Citation Formats

Bulaevskii, L. N., Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Chudnovsky, E. M., and Maley, M. P. Magnetic pinning in superconductor-ferromagnet multilayers. United States: N. p., 2000. Web. doi:10.1063/1.126419.
Bulaevskii, L. N., Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Chudnovsky, E. M., & Maley, M. P. Magnetic pinning in superconductor-ferromagnet multilayers. United States. doi:10.1063/1.126419.
Bulaevskii, L. N., Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Chudnovsky, E. M., and Maley, M. P. Mon . "Magnetic pinning in superconductor-ferromagnet multilayers". United States. doi:10.1063/1.126419.
@article{osti_20216179,
title = {Magnetic pinning in superconductor-ferromagnet multilayers},
author = {Bulaevskii, L. N. and Los Alamos National Laboratory, Los Alamos, New Mexico 87545 and Chudnovsky, E. M. and Maley, M. P.},
abstractNote = {We argue that superconductor/ferromagnet multilayers of nanoscale period should exhibit strong pinning of vortices by the magnetic domain structure in magnetic fields below the coercive field when ferromagnetic layers exhibit strong perpendicular magnetic anisotropy. The estimated maximum magnetic pinning energy for single vortex in such a system is about 100 times larger than the pinning energy by columnar defects. This pinning energy may provide critical currents as high as 10{sup 6}-10{sup 7} A/cm{sup 2} at high temperatures (but not very close to T{sub c}) at least in magnetic fields below 0.1 T. (c) 2000 American Institute of Physics.},
doi = {10.1063/1.126419},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 18,
volume = 76,
place = {United States},
year = {2000},
month = {5}
}