BaZrO3導入ErBa2Cu3O7-δ膜の磁場中超伝導特性

向田 昌志; 新海 優樹; 堀出 朋哉; 齋藤 敦; 伊藤 正志; 喜多 隆介; 松本 要; 吉田 隆; 一瀬 中; 堀井 滋; 山田 和広; 森 信幸

doi:10.2221/jcsj.41.123

Originals

Superconducting Characteristics of ErBa₂Cu₃O_7-δ Films with BaZrO₃ Nano-rods in a Magnetic Field

Masashi MUKAIDA, Yuki SHINGAI, Tomoya HORIDE, Atsushi SAITO, Masashi ITO, Ryusuke KITA, Kaname MATSUMOTO, Yutaka YOSHIDA, Ataru ICHINOSE, Shigeru HORII, Kazuhiro YAMADA, Nobuyuki MORI

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Keywords: BaZrO₃ nano-rods, ErBa₂Cu₃O_7-δ films, matching field, J_C enhancement

JOURNAL FREE ACCESS

2006 Volume 41 Issue 3 Pages 123-130

DOI https://doi.org/10.2221/jcsj.41.123

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Abstract

The effects of artificial pinning centers (APCs) in ErBa₂Cu₃O_7-δ films are discussed. The APC used for this research was BaZrO₃ which was mixed into an ErBa₂Cu₃O_7-δ ceramic target. The target was ablated and the films were grown on substrates with APCs. The X-ray diffraction patterns show that there were no other phases than ErBa₂Cu₃O_7-δ and BaZrO₃. Transmission electron microscopy (TEM) revealed that the BaZrO₃ APSs grow along the c-axis of the films. The introduction of APCs decreases the surface resistance of the ErBa₂Cu₃O_7-δ film and dramatically increases the critical current density (J_C). Strong J_C enhancement at the B¦¦ c-axis coincides with the growth direction of the APCs.

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