Self-induced magnetic flux structure in the magnetic superconductor RbEuFe4As4

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

doi:10.1103/PhysRevB.99.134503

Title: Self-induced magnetic flux structure in the magnetic superconductor ${RbEuFe}_{4} {As}_{4}$

Journal Article · Wed Apr 03 00:00:00 EDT 2019 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.99.134503· OSTI ID:1508383

Vlasko-Vlasov, V. K. ^[1]; Koshelev, A. E. ^[1]; Smylie, M. ^[2]; Bao, J. -K. ^[1]; Chung, D. Y. ^[1]; Kanatzidis, M. G. ^[3]; Welp, U. ^[1]; Kwok, W. -K. ^[1]

Argonne National Lab. (ANL), Argonne, IL (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); Hofstra Univ., Heampstead, NY (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); Northwestern Univ., Evanston, IL (United States)

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, T_m. 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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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1508383

Alternate ID(s):: OSTI ID: 1504803

Journal Information:: Physical Review B, Vol. 99, Issue 13; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 14 works

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References (22)

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