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Title: Temperature Dependence of the Critical Field of the Organic Superconductor {kappa}-(BEDT-TTF){sub 2}Cu[N(CN){sub 2}]Br.

Abstract

We present upper critical magnetic fields data for kappa(BEDT-TTF)(2)Cu[N(CN)(2)]Br (hereafter k-Br), single crystals with the magnetic field applied either or perpendicular and parallel to the conducting layers. The H-T phase diagram in these single crystals has been deduced from tunnel diode oscillator-based contactless measurements in pulsed magnetic fields up to 56 T for the inter-plane (H parallel to b) and in-plane (H parallel to ac) field directions. Temperature dependence of the magnetic penetration depth in DC fields is also reported. The temperature dependence of the upper critical magnetic field H-c2(T) is not accounted for the Werthamer-Helfand-Hohenberg model for in-plane configuration. For the inter-plane orientation, a significant upward curvature is observed as the temperature decreases, in the range close to T-c, followed by saturation at lower temperatures. Possibly, this upturn is an indication of flux-line lattice melting.

Authors:
; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
Russian Foundation for Basic Research; Russian Academy of Sciences; European Magnetic Field Laboratory (EMFL)
OSTI Identifier:
1572454
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
JETP Letters
Additional Journal Information:
Journal Volume: 110; Journal Issue: 1
Country of Publication:
United States
Language:
English

Citation Formats

Gasparov, V. A., Audouard, A., Drigo, L., and Schleuter, J. A. Temperature Dependence of the Critical Field of the Organic Superconductor {kappa}-(BEDT-TTF){sub 2}Cu[N(CN){sub 2}]Br.. United States: N. p., 2019. Web. doi:10.1134/S0021364019130022.
Gasparov, V. A., Audouard, A., Drigo, L., & Schleuter, J. A. Temperature Dependence of the Critical Field of the Organic Superconductor {kappa}-(BEDT-TTF){sub 2}Cu[N(CN){sub 2}]Br.. United States. doi:10.1134/S0021364019130022.
Gasparov, V. A., Audouard, A., Drigo, L., and Schleuter, J. A. Mon . "Temperature Dependence of the Critical Field of the Organic Superconductor {kappa}-(BEDT-TTF){sub 2}Cu[N(CN){sub 2}]Br.". United States. doi:10.1134/S0021364019130022.
@article{osti_1572454,
title = {Temperature Dependence of the Critical Field of the Organic Superconductor {kappa}-(BEDT-TTF){sub 2}Cu[N(CN){sub 2}]Br.},
author = {Gasparov, V. A. and Audouard, A. and Drigo, L. and Schleuter, J. A.},
abstractNote = {We present upper critical magnetic fields data for kappa(BEDT-TTF)(2)Cu[N(CN)(2)]Br (hereafter k-Br), single crystals with the magnetic field applied either or perpendicular and parallel to the conducting layers. The H-T phase diagram in these single crystals has been deduced from tunnel diode oscillator-based contactless measurements in pulsed magnetic fields up to 56 T for the inter-plane (H parallel to b) and in-plane (H parallel to ac) field directions. Temperature dependence of the magnetic penetration depth in DC fields is also reported. The temperature dependence of the upper critical magnetic field H-c2(T) is not accounted for the Werthamer-Helfand-Hohenberg model for in-plane configuration. For the inter-plane orientation, a significant upward curvature is observed as the temperature decreases, in the range close to T-c, followed by saturation at lower temperatures. Possibly, this upturn is an indication of flux-line lattice melting.},
doi = {10.1134/S0021364019130022},
journal = {JETP Letters},
number = 1,
volume = 110,
place = {United States},
year = {2019},
month = {7}
}

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