Inversion of the upper critical field anisotropy in FeTeS films

B. Maiorov, Paolo Mele, S. A. Baily, M. Weigand, S. Z. Lin, F. F. Balakirev, K. Matsumoto, H. Nagayoshi, S. Fujita, Y. Yoshida, Y. Ichino, T. Kiss, A. Ichinose, M. Mukaida, L. Civale

研究成果: Article

6 引用 (Scopus)

抄録

We present the complete superconducting upper critical field (H c2) - temperature (T) diagram of FeTeS films measured at three crystalline orientations (H ∥ c, 45° and ab). We find that Hc2 is almost isotropic in magnetic field orientation with μ0Hc2 (T = 0) ∼ 30 T and a transition temperature of Tc ∼ 7 K. A small but clear Hc2 angular anisotropy is observed, with a crossover around T = 0.7Tc, from Hc2 (∥ c) < Hc2 (∥ ab) for T > 0.7Tc to H c2 (∥ c) > Hc2 (∥ ab) for T < 0.7T c. This change in the anisotropy is similar to that observed in FeTeS and FeTeSe single crystals but occurs at a higher T/Tc for our film. We analyze the Hc2 (T) in terms of pair-breaking mechanisms and two-band superconductor theory. Understanding the inversion of Hc2 opens the possibility to adjust the effective anisotropy of superconductors for different applications.

元の言語English
記事番号044005
ジャーナルSuperconductor Science and Technology
巻27
発行部数4
DOI
出版物ステータスPublished - 2014 1 1
外部発表Yes

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Anisotropy
inversions
anisotropy
Superconducting materials
Crystal orientation
Superconducting transition temperature
crossovers
transition temperature
diagrams
Single crystals
Magnetic fields
Crystalline materials
single crystals
magnetic fields
Temperature
temperature

ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

これを引用

Maiorov, B., Mele, P., Baily, S. A., Weigand, M., Lin, S. Z., Balakirev, F. F., ... Civale, L. (2014). Inversion of the upper critical field anisotropy in FeTeS films. Superconductor Science and Technology, 27(4), [044005]. https://doi.org/10.1088/0953-2048/27/4/044005

Inversion of the upper critical field anisotropy in FeTeS films. / Maiorov, B.; Mele, Paolo; Baily, S. A.; Weigand, M.; Lin, S. Z.; Balakirev, F. F.; Matsumoto, K.; Nagayoshi, H.; Fujita, S.; Yoshida, Y.; Ichino, Y.; Kiss, T.; Ichinose, A.; Mukaida, M.; Civale, L.

：: Superconductor Science and Technology, 巻 27, 番号 4, 044005, 01.01.2014.

研究成果: Article

Maiorov, B, Mele, P, Baily, SA, Weigand, M, Lin, SZ, Balakirev, FF, Matsumoto, K, Nagayoshi, H, Fujita, S, Yoshida, Y, Ichino, Y, Kiss, T, Ichinose, A, Mukaida, M & Civale, L 2014, 'Inversion of the upper critical field anisotropy in FeTeS films', Superconductor Science and Technology, 巻. 27, 番号 4, 044005. https://doi.org/10.1088/0953-2048/27/4/044005
Maiorov B, Mele P, Baily SA, Weigand M, Lin SZ, Balakirev FF その他. Inversion of the upper critical field anisotropy in FeTeS films. Superconductor Science and Technology. 2014 1 1;27(4). 044005. https://doi.org/10.1088/0953-2048/27/4/044005
Maiorov, B. ; Mele, Paolo ; Baily, S. A. ; Weigand, M. ; Lin, S. Z. ; Balakirev, F. F. ; Matsumoto, K. ; Nagayoshi, H. ; Fujita, S. ; Yoshida, Y. ; Ichino, Y. ; Kiss, T. ; Ichinose, A. ; Mukaida, M. ; Civale, L. / Inversion of the upper critical field anisotropy in FeTeS films. ：: Superconductor Science and Technology. 2014 ; 巻 27, 番号 4.
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AU - Maiorov, B.

AU - Mele, Paolo

AU - Baily, S. A.

AU - Weigand, M.

AU - Lin, S. Z.

AU - Balakirev, F. F.

AU - Matsumoto, K.

AU - Nagayoshi, H.

AU - Fujita, S.

AU - Yoshida, Y.

AU - Ichino, Y.

AU - Kiss, T.

AU - Ichinose, A.

AU - Mukaida, M.

AU - Civale, L.

PY - 2014/1/1

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N2 - We present the complete superconducting upper critical field (H c2) - temperature (T) diagram of FeTeS films measured at three crystalline orientations (H ∥ c, 45° and ab). We find that Hc2 is almost isotropic in magnetic field orientation with μ0Hc2 (T = 0) ∼ 30 T and a transition temperature of Tc ∼ 7 K. A small but clear Hc2 angular anisotropy is observed, with a crossover around T = 0.7Tc, from Hc2 (∥ c) < Hc2 (∥ ab) for T > 0.7Tc to H c2 (∥ c) > Hc2 (∥ ab) for T < 0.7T c. This change in the anisotropy is similar to that observed in FeTeS and FeTeSe single crystals but occurs at a higher T/Tc for our film. We analyze the Hc2 (T) in terms of pair-breaking mechanisms and two-band superconductor theory. Understanding the inversion of Hc2 opens the possibility to adjust the effective anisotropy of superconductors for different applications.

AB - We present the complete superconducting upper critical field (H c2) - temperature (T) diagram of FeTeS films measured at three crystalline orientations (H ∥ c, 45° and ab). We find that Hc2 is almost isotropic in magnetic field orientation with μ0Hc2 (T = 0) ∼ 30 T and a transition temperature of Tc ∼ 7 K. A small but clear Hc2 angular anisotropy is observed, with a crossover around T = 0.7Tc, from Hc2 (∥ c) < Hc2 (∥ ab) for T > 0.7Tc to H c2 (∥ c) > Hc2 (∥ ab) for T < 0.7T c. This change in the anisotropy is similar to that observed in FeTeS and FeTeSe single crystals but occurs at a higher T/Tc for our film. We analyze the Hc2 (T) in terms of pair-breaking mechanisms and two-band superconductor theory. Understanding the inversion of Hc2 opens the possibility to adjust the effective anisotropy of superconductors for different applications.

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