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Title: Cooperative Response of the Magnetism and Superconductivty in the Magnetic Superconductor RbEuFe{sub 4}As{sub 4}.

Abstract

We present a study of the magnetic-flux evolution in the magnetic superconductor RbEuFe4As4 performed using magneto-optical imaging and magnetization measurements during field cooling and warming and magnetic field cycling at temperatures above and below the magnetic transition point, T-m. The vortex patterns emerging at T less than or similar to T-m reveal that the Eu-spin subsystem serves as an internal pump of the magnetic flux while the superconducting critical current controls the delivery of magnetic-flux quanta into the bulk. The interplay of magnetic susceptibility amplifying the magnetic induction and vortex pinning attenuating the magnetic-flux entry results in a field- and temperature-dependent critical state that emulates a paramagnetic Meissner effect. The observed vortex dynamics corresponds to a nontrivial spatial current distribution and yields a self-consistent inhomogeneous enhancement of the sample magnetization.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science - Office of Basic Energy Sciences - Materials Sciences and Engineering Division; USDOE
OSTI Identifier:
1606242
Alternate Identifier(s):
OSTI ID: 1604233
Grant/Contract Number:  
[AC02-06CH11357]
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review, B: Condensed Matter
Additional Journal Information:
[ Journal Volume: 101; Journal Issue: 10]
Country of Publication:
United States
Language:
English

Citation Formats

Vlasko-Vlasov, V. K., Welp, U., Koshelev, A. E., Smylie, M., Bao, J. -K., Chung, D. Y., Kanatzidis, M. G., and Kwok, W. -K. Cooperative Response of the Magnetism and Superconductivty in the Magnetic Superconductor RbEuFe{sub 4}As{sub 4}.. United States: N. p., 2020. Web. doi:10.1103/PhysRevB.101.104504.
Vlasko-Vlasov, V. K., Welp, U., Koshelev, A. E., Smylie, M., Bao, J. -K., Chung, D. Y., Kanatzidis, M. G., & Kwok, W. -K. Cooperative Response of the Magnetism and Superconductivty in the Magnetic Superconductor RbEuFe{sub 4}As{sub 4}.. United States. doi:10.1103/PhysRevB.101.104504.
Vlasko-Vlasov, V. K., Welp, U., Koshelev, A. E., Smylie, M., Bao, J. -K., Chung, D. Y., Kanatzidis, M. G., and Kwok, W. -K. Wed . "Cooperative Response of the Magnetism and Superconductivty in the Magnetic Superconductor RbEuFe{sub 4}As{sub 4}.". United States. doi:10.1103/PhysRevB.101.104504.
@article{osti_1606242,
title = {Cooperative Response of the Magnetism and Superconductivty in the Magnetic Superconductor RbEuFe{sub 4}As{sub 4}.},
author = {Vlasko-Vlasov, V. K. and Welp, U. and Koshelev, A. E. and Smylie, M. and Bao, J. -K. and Chung, D. Y. and Kanatzidis, M. G. and Kwok, W. -K.},
abstractNote = {We present a study of the magnetic-flux evolution in the magnetic superconductor RbEuFe4As4 performed using magneto-optical imaging and magnetization measurements during field cooling and warming and magnetic field cycling at temperatures above and below the magnetic transition point, T-m. The vortex patterns emerging at T less than or similar to T-m reveal that the Eu-spin subsystem serves as an internal pump of the magnetic flux while the superconducting critical current controls the delivery of magnetic-flux quanta into the bulk. The interplay of magnetic susceptibility amplifying the magnetic induction and vortex pinning attenuating the magnetic-flux entry results in a field- and temperature-dependent critical state that emulates a paramagnetic Meissner effect. The observed vortex dynamics corresponds to a nontrivial spatial current distribution and yields a self-consistent inhomogeneous enhancement of the sample magnetization.},
doi = {10.1103/PhysRevB.101.104504},
journal = {Physical Review, B: Condensed Matter},
number = [10],
volume = [101],
place = {United States},
year = {2020},
month = {3}
}

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