Thermally activated flux flow in superconducting epitaxial FeSe0.6Te0.4 thin film

D. Ahmad; W. J. Choi; Y. I. Seo; Sehun Seo; Sanghan Lee; Yong Seung Kwon

doi:10.1016/j.rinp.2016.11.054

Thermally activated flux flow in superconducting epitaxial FeSe_0.6Te_0.4 thin film

D. Ahmad, W. J. Choi, Y. I. Seo, Sehun Seo, Sanghan Lee, Yong Seung Kwon

Department of Physics and Chemistry

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

30 Scopus citations

Abstract

The thermally activated flux flow effect has been studied in epitaxial FeSe_0.6Te_0.4 thin film grown by a PLD method through the electrical resistivity measurement under various magnetic fields for B//c and B//ab. The results showed that the thermally activated flux flow effect is well described by the nonlinear temperature-dependent activation energy. The evaluated apparent activation energy U₀(B) is one order larger than the reported results and showed the double-linearity in both magnetic field directions. Furthermore, the FeSe_0.6Te_0.4 thin film shows the anisotropy of 5.6 near T_c and 2D-like superconducting behavior in thermally activated flux flow region. In addition, the vortex glass transition and the temperature dependence of the high critical fields were determined.

Original language	English
Pages (from-to)	16-20
Number of pages	5
Journal	Results in Physics
Volume	7
DOIs	https://doi.org/10.1016/j.rinp.2016.11.054
State	Published - 2017

Bibliographical note

Publisher Copyright:
© 2016

Keywords

Apparent activation energy
FeSeTe thin film
Thermally activated flus flow

Access to Document

10.1016/j.rinp.2016.11.054

Cite this

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title = "Thermally activated flux flow in superconducting epitaxial FeSe0.6Te0.4 thin film",

abstract = "The thermally activated flux flow effect has been studied in epitaxial FeSe0.6Te0.4 thin film grown by a PLD method through the electrical resistivity measurement under various magnetic fields for B//c and B//ab. The results showed that the thermally activated flux flow effect is well described by the nonlinear temperature-dependent activation energy. The evaluated apparent activation energy U0(B) is one order larger than the reported results and showed the double-linearity in both magnetic field directions. Furthermore, the FeSe0.6Te0.4 thin film shows the anisotropy of 5.6 near Tc and 2D-like superconducting behavior in thermally activated flux flow region. In addition, the vortex glass transition and the temperature dependence of the high critical fields were determined.",

keywords = "Apparent activation energy, FeSeTe thin film, Thermally activated flus flow",

author = "D. Ahmad and Choi, {W. J.} and Seo, {Y. I.} and Sehun Seo and Sanghan Lee and Kwon, {Yong Seung}",

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doi = "10.1016/j.rinp.2016.11.054",

language = "English",

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journal = "Results in Physics",

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T1 - Thermally activated flux flow in superconducting epitaxial FeSe0.6Te0.4 thin film

AU - Ahmad, D.

AU - Choi, W. J.

AU - Seo, Y. I.

AU - Seo, Sehun

AU - Lee, Sanghan

AU - Kwon, Yong Seung

PY - 2017

Y1 - 2017

N2 - The thermally activated flux flow effect has been studied in epitaxial FeSe0.6Te0.4 thin film grown by a PLD method through the electrical resistivity measurement under various magnetic fields for B//c and B//ab. The results showed that the thermally activated flux flow effect is well described by the nonlinear temperature-dependent activation energy. The evaluated apparent activation energy U0(B) is one order larger than the reported results and showed the double-linearity in both magnetic field directions. Furthermore, the FeSe0.6Te0.4 thin film shows the anisotropy of 5.6 near Tc and 2D-like superconducting behavior in thermally activated flux flow region. In addition, the vortex glass transition and the temperature dependence of the high critical fields were determined.

AB - The thermally activated flux flow effect has been studied in epitaxial FeSe0.6Te0.4 thin film grown by a PLD method through the electrical resistivity measurement under various magnetic fields for B//c and B//ab. The results showed that the thermally activated flux flow effect is well described by the nonlinear temperature-dependent activation energy. The evaluated apparent activation energy U0(B) is one order larger than the reported results and showed the double-linearity in both magnetic field directions. Furthermore, the FeSe0.6Te0.4 thin film shows the anisotropy of 5.6 near Tc and 2D-like superconducting behavior in thermally activated flux flow region. In addition, the vortex glass transition and the temperature dependence of the high critical fields were determined.

KW - Apparent activation energy

KW - FeSeTe thin film

KW - Thermally activated flus flow

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DO - 10.1016/j.rinp.2016.11.054

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