Self-induced magnetic flux structure in the magnetic superconductor RbEuFe4As4

V. K. Vlasko-Vlasov; A. E. Koshelev; M. Smylie; J. K. Bao; D. Y. Chung; M. G. Kanatzidis; U. Welp; W. K. Kwok

doi:10.1103/PhysRevB.99.134503

Self-induced magnetic flux structure in the magnetic superconductor RbEuFe4As4

V. K. Vlasko-Vlasov^*, A. E. Koshelev, M. Smylie, J. K. Bao, D. Y. Chung, M. G. Kanatzidis, U. Welp, W. K. Kwok

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

We report an unusual enhancement of the magnetic induction in single crystals of the magnetic superconductor RbEuFe4As4, highlighting the interplay between superconducting and magnetic subsystems in this material. Contrary to the conventional Meissner expulsion of magnetic flux below the superconducting transition temperature, we observe a substantial boost of the magnetic flux density upon approaching the magnetic transition temperature, Tm. Direct imaging of the flux evolution with a magneto-optical technique, shows that the magnetic subsystem serves as an internal magnetic flux pump, drawing Abrikosov vortices from the surface, while the superconducting subsystem controls their conveyance into the bulk of the magnetic superconductor via a peculiar self-organized critical state.

Original language	English (US)
Article number	134503
Journal	Physical Review B
Volume	99
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevB.99.134503
State	Published - Apr 3 2019

Funding

This work was supported by the U.S. Department of Energy, Office of Science, Materials Sciences and Engineering Division.

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.99.134503

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abstract = "We report an unusual enhancement of the magnetic induction in single crystals of the magnetic superconductor RbEuFe4As4, highlighting the interplay between superconducting and magnetic subsystems in this material. Contrary to the conventional Meissner expulsion of magnetic flux below the superconducting transition temperature, we observe a substantial boost of the magnetic flux density upon approaching the magnetic transition temperature, Tm. Direct imaging of the flux evolution with a magneto-optical technique, shows that the magnetic subsystem serves as an internal magnetic flux pump, drawing Abrikosov vortices from the surface, while the superconducting subsystem controls their conveyance into the bulk of the magnetic superconductor via a peculiar self-organized critical state.",

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AU - Vlasko-Vlasov, V. K.

AU - Koshelev, A. E.

AU - Smylie, M.

AU - Bao, J. K.

AU - Chung, D. Y.

AU - Kanatzidis, M. G.

AU - Welp, U.

AU - Kwok, W. K.

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AB - We report an unusual enhancement of the magnetic induction in single crystals of the magnetic superconductor RbEuFe4As4, highlighting the interplay between superconducting and magnetic subsystems in this material. Contrary to the conventional Meissner expulsion of magnetic flux below the superconducting transition temperature, we observe a substantial boost of the magnetic flux density upon approaching the magnetic transition temperature, Tm. Direct imaging of the flux evolution with a magneto-optical technique, shows that the magnetic subsystem serves as an internal magnetic flux pump, drawing Abrikosov vortices from the surface, while the superconducting subsystem controls their conveyance into the bulk of the magnetic superconductor via a peculiar self-organized critical state.

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Self-induced magnetic flux structure in the magnetic superconductor RbEuFe4As4

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