Delocalization of vortex in SmBa2Cu3O7- δ superconducting films with BaHfO3 nano-rods

Yuji Tsuchiya, Satoshi Awaji, Kazuo Watanabe, Shun Miura, Yusuke Ichino, Yutaka Yoshida, Kaname Matsumoto

研究成果: ジャーナルへの寄稿記事

7 引用 (Scopus)

抄録

Transport measurements revealed flux pinning properties and vortex phases in SmBa2Cu3O7-δ (Sm123) superconducting films with BaHfO3 nano-rods on LaAlO3 substrates. The films have large matching fields BΦ up to 9.9 T, nano-rod diameters of ∼6 nm, and a slight Tc degradation with Tc ∼ 91.8 K by using the low temperature growth technique. According to the transport results, a small critical exponent ∼4 indicates the presence of a Bose-glass phase in the films. Double peaks of the flux pinning force density are unexpectedly observed at high temperatures over 80 K, which is accompanied by steep drops of the crossover magnetic fields between the single vortex pinning and the collective pinning states. The drops are explained by the delocalization of the vortex where the vortex is pinned by many nano-rods in the single vortex pinning state. From the viewpoint of the vortex delocalization, we conclude that BΦ should be less than 11 T for applications at liquid nitrogen temperature.

元の言語英語
記事番号103902
ジャーナルJournal of Applied Physics
120
発行部数10
DOI
出版物ステータス出版済み - 9 14 2016
外部発表Yes

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superconducting films
rods
vortices
flux pinning
liquid nitrogen
crossovers
exponents
degradation
glass
magnetic fields

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

これを引用

Tsuchiya, Y., Awaji, S., Watanabe, K., Miura, S., Ichino, Y., Yoshida, Y., & Matsumoto, K. (2016). Delocalization of vortex in SmBa2Cu3O7- δ superconducting films with BaHfO3 nano-rods. Journal of Applied Physics, 120(10), [103902]. https://doi.org/10.1063/1.4962398

Delocalization of vortex in SmBa2Cu3O7- δ superconducting films with BaHfO3 nano-rods. / Tsuchiya, Yuji; Awaji, Satoshi; Watanabe, Kazuo; Miura, Shun; Ichino, Yusuke; Yoshida, Yutaka; Matsumoto, Kaname.

:: Journal of Applied Physics, 巻 120, 番号 10, 103902, 14.09.2016.

研究成果: ジャーナルへの寄稿記事

Tsuchiya, Y, Awaji, S, Watanabe, K, Miura, S, Ichino, Y, Yoshida, Y & Matsumoto, K 2016, 'Delocalization of vortex in SmBa2Cu3O7- δ superconducting films with BaHfO3 nano-rods', Journal of Applied Physics, 巻. 120, 番号 10, 103902. https://doi.org/10.1063/1.4962398
Tsuchiya, Yuji ; Awaji, Satoshi ; Watanabe, Kazuo ; Miura, Shun ; Ichino, Yusuke ; Yoshida, Yutaka ; Matsumoto, Kaname. / Delocalization of vortex in SmBa2Cu3O7- δ superconducting films with BaHfO3 nano-rods. :: Journal of Applied Physics. 2016 ; 巻 120, 番号 10.
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abstract = "Transport measurements revealed flux pinning properties and vortex phases in SmBa2Cu3O7-δ (Sm123) superconducting films with BaHfO3 nano-rods on LaAlO3 substrates. The films have large matching fields BΦ up to 9.9 T, nano-rod diameters of ∼6 nm, and a slight Tc degradation with Tc ∼ 91.8 K by using the low temperature growth technique. According to the transport results, a small critical exponent ∼4 indicates the presence of a Bose-glass phase in the films. Double peaks of the flux pinning force density are unexpectedly observed at high temperatures over 80 K, which is accompanied by steep drops of the crossover magnetic fields between the single vortex pinning and the collective pinning states. The drops are explained by the delocalization of the vortex where the vortex is pinned by many nano-rods in the single vortex pinning state. From the viewpoint of the vortex delocalization, we conclude that BΦ should be less than 11 T for applications at liquid nitrogen temperature.",
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AU - Watanabe, Kazuo

AU - Miura, Shun

AU - Ichino, Yusuke

AU - Yoshida, Yutaka

AU - Matsumoto, Kaname

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N2 - Transport measurements revealed flux pinning properties and vortex phases in SmBa2Cu3O7-δ (Sm123) superconducting films with BaHfO3 nano-rods on LaAlO3 substrates. The films have large matching fields BΦ up to 9.9 T, nano-rod diameters of ∼6 nm, and a slight Tc degradation with Tc ∼ 91.8 K by using the low temperature growth technique. According to the transport results, a small critical exponent ∼4 indicates the presence of a Bose-glass phase in the films. Double peaks of the flux pinning force density are unexpectedly observed at high temperatures over 80 K, which is accompanied by steep drops of the crossover magnetic fields between the single vortex pinning and the collective pinning states. The drops are explained by the delocalization of the vortex where the vortex is pinned by many nano-rods in the single vortex pinning state. From the viewpoint of the vortex delocalization, we conclude that BΦ should be less than 11 T for applications at liquid nitrogen temperature.

AB - Transport measurements revealed flux pinning properties and vortex phases in SmBa2Cu3O7-δ (Sm123) superconducting films with BaHfO3 nano-rods on LaAlO3 substrates. The films have large matching fields BΦ up to 9.9 T, nano-rod diameters of ∼6 nm, and a slight Tc degradation with Tc ∼ 91.8 K by using the low temperature growth technique. According to the transport results, a small critical exponent ∼4 indicates the presence of a Bose-glass phase in the films. Double peaks of the flux pinning force density are unexpectedly observed at high temperatures over 80 K, which is accompanied by steep drops of the crossover magnetic fields between the single vortex pinning and the collective pinning states. The drops are explained by the delocalization of the vortex where the vortex is pinned by many nano-rods in the single vortex pinning state. From the viewpoint of the vortex delocalization, we conclude that BΦ should be less than 11 T for applications at liquid nitrogen temperature.

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