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: Contribution to journalArticle査読

11 被引用数 (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.

本文言語英語
論文番号103902
ジャーナルJournal of Applied Physics
120
10
DOI
出版ステータス出版済み - 9 14 2016
外部発表はい

All Science Journal Classification (ASJC) codes

  • 物理学および天文学(全般)

フィンガープリント

「Delocalization of vortex in SmBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-</sub> <sub>δ</sub> superconducting films with BaHfO<sub>3</sub> nano-rods」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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