Disorder effect and the vortex phase transition in layered organic superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br
Abstract
We report systematic detailed measurement of the superconducting properties on the layered organic superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br near 80 K and the effect of disorder on the superconducting transition temperature Tc. The reversible part of the magnetization (reversible magnetization) and the magnetic entropy change (ΔS) were studied. Using the London model, we determine the temperature dependence of the London penetration depth (λ) from the slope of the linear M(lnH) dependence of the isothermal magnetization. Our results show the strong dependence of ΔS and λ on the temperature. The structural transformation which occurs at the vicinity of 80 K very strongly influences the physics of vortex lattice and the associated magnetic behavior.
Keywords
Organic superconductor,
reversible magnetization,
magnetic entropy change,
vortex pinning,
London penetration depth
Supporting agencies: This research was partially supported by CNRS (France) and CNRST (Morocco).
About the Authors
H. El Ouaddi
E.M.S, Research Laboratory, Faculty of Science, University Ibn Zoh
Morocco
Morocco
Agadir
A. Tirbiyine
E.M.S, Research Laboratory, Faculty of Science, University Ibn Zoh
Morocco
Morocco
Agadir
A. Taoufik
E.M.S, Research Laboratory, Faculty of Science, University Ibn Zoh
Morocco
Morocco
Agadir
Y. Ait Ahmed
E.M.S, Research Laboratory, Faculty of Science, University Ibn Zoh
Morocco
Morocco
Agadir
A. Hafid
E.M.S, Research Laboratory, Faculty of Science, University Ibn Zoh
Morocco
Morocco
Agadir
M. Mamor
M.S.I.S.M, Research Laboratory, Polydisciplinary Faculty, University Cadi Ayyad
Morocco
Morocco
Safi
H. Chaib
L.P.M.C.N.E.R, Research Laboratory, Faculty of Science, University Ibn Zoh
Morocco
Morocco
Agadir
A. Nafidi
L.P.M.C.N.E.R, Research Laboratory, Faculty of Science, University Ibn Zoh
Morocco
Morocco
Agadir
S. Snoussi
Laboratoire de Physique des Solides, UMR 8502, Université Paris-Sud
France
France
Bat.510, 91405 Orsay
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Review
For citations:
El Ouaddi H., Tirbiyine A., Taoufik A., Ait Ahmed Y., Hafid A., Mamor M., Chaib H., Nafidi A., Snoussi S. Disorder effect and the vortex phase transition in layered organic superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br. Magnetic Resonance in Solids. 2018;20(1):18103 (7 pp.).
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