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Journal of Superconductivity and Novel Magnetism

, Volume 32, Issue 12, pp 3797–3802 | Cite as

Effect of Trapped Magnetic Flux on Neutron Scattering in La1.85Sr0.15CuO4 Superconductor

  • A. A. BykovEmail author
  • D. M. Gokhfeld
  • E. V. Altynbaev
  • K. Yu Terent’ev
  • N. Martin
  • S. V. Semenov
  • S. V. Grigoriev
Original Paper
  • 91 Downloads

Abstract

The superconducting La1.85Sr0.15CuO4 ceramics has been studied by small angle neutron scattering, magnetization measurements, and scanning electron microscopy. Experiments have shown that the intensity of the magnetic scattering is 2–3 times higher in the field cooled regime than in the zero-field cooled regime. Additional magnetic heterogeneities due to closure of the trapped magnetic flux cause the excess scattering in the field cooled regime. The isotropic nature of the scattering is associated with the absence of a preferred direction of the Abrikosov vortices, which is caused by the random orientation of the ab planes of the anisotropic superconductor granules.

Keywords

Superconductivity SANS Trapped field LSCO · 

Notes

Acknowledgments

The authors are grateful to G.P. Kopitsa and V.V. Runov for fruitful discussions.

Funding Information

The work is supported by the Russian Science Foundation (project No. 17-72-10067).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.NRC Kurchatov Institute – PNPIGatchinaRussia
  2. 2.Federal Research Center KSC SB RASKirensky Institute of PhysicsKrasnoyarskRussia
  3. 3.Laboratoire Léon Brillouin, CEA, CNRSUniversité Paris-SaclayGif-sur-YvetteFrance
  4. 4.Saint-Petersburg State UniversitySaint-PetersburgRussia

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