Inversion of the upper critical field anisotropy in FeTeS films

B. Maiorov; P. 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

doi:10.1088/0953-2048/27/4/044005

Inversion of the upper critical field anisotropy in FeTeS films

B. Maiorov, P. 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

7 引用（Scopus）

抜粋

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 H_c2 is almost isotropic in magnetic field orientation with μ₀H_c2 (T = 0) ∼ 30 T and a transition temperature of T_c ∼ 7 K. A small but clear H_c2 angular anisotropy is observed, with a crossover around T = 0.7T_c, from H_c2 (∥ c) < H_c2 (∥ ab) for T > 0.7T_c to H _c2 (∥ c) > H_c2 (∥ 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/T_c for our film. We analyze the H_c2 (T) in terms of pair-breaking mechanisms and two-band superconductor theory. Understanding the inversion of H_c2 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	https://doi.org/10.1088/0953-2048/27/4/044005
出版物ステータス	Published - 2014 4
外部発表	Yes

ASJC Scopus subject areas

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

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10.1088/0953-2048/27/4/044005

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Maiorov, B., Mele, P., 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. (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

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title = "Inversion of the upper critical field anisotropy in FeTeS films",

abstract = "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.",

keywords = "anisotropy, chalcogens, thin films, twoband superconductor, upper critical field",

author = "B. Maiorov and P. Mele and Baily, {S. A.} and M. Weigand and Lin, {S. Z.} and Balakirev, {F. F.} and K. Matsumoto and H. Nagayoshi and S. Fujita and Y. Yoshida and Y. Ichino and T. Kiss and A. Ichinose and M. Mukaida and L. Civale",

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doi = "10.1088/0953-2048/27/4/044005",

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T1 - Inversion of the upper critical field anisotropy in FeTeS films

AU - Maiorov, B.

AU - Mele, P.

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 - 2014/4

Y1 - 2014/4

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.

KW - anisotropy

KW - chalcogens

KW - thin films

KW - twoband superconductor

KW - upper critical field

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