Direct observation of the dynamics of vortices in high temperature superconducting bulks and development of the strong bulk magnet

高温超导块体中涡流动力学的直接观察和强块体磁体的开发

• 批准号: 20560001
• 负责人: NAITO Tomoyuki
• 金额: $ 2.75万
• 依托单位: Iwate University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20560001/
• 关键词: 超伝導バルク磁石; パルス着磁; 磁束ダイナミクス; 磁束ピン止め; 臨界電流密度; 元素置換効果; 超伝導バルク

To study the dynamics of vortices in high temperature superconducting bulks in the pulsed field, both local vortex densities and temperatures were measured. The vortices intruded into the bulk not only at the edges but also at the surfaces. The distribution of the local critical current density which was estimated from the magnetization loop using the small pieces cut from the bulk was consistent with the inhomogeneous trapped magnetic field profiles. The vortices were trapped at the weak /strong pinning region for the low/high applied magnetic field.

为了研究脉冲场中高温超导体中涡流的动力学，测量了局部涡流密度和温度。涡流不仅在边缘而且在表面侵入主体。使用从块体上切下的小块根据磁化环估计的局部临界电流密度的分布与不均匀俘获磁场分布一致。涡流被捕获在低/高施加磁场的弱/强钉扎区域。

项目成果

Vortex pinning properties of (Y1-xLax)-Ba-Cu-O and (Y1-xPrx)-Ba-Cu-O superconducting bulks

(Y1-xLax)-Ba-Cu-O 和 (Y1-xPrx)-Ba-Cu-O 超导体的涡旋钉扎特性

• 发表时间: 2009
• 影响因子: 1.7
• 作者: T. Naito; K. Sato; D. Yamaguchi;H. Fujishiro
• 通讯作者: H. Fujishiro

Pulsed field magnetization for GdBaCuO bulk with stronger pinning characteristics

GdBaCuO 块体的脉冲场磁化具有更强的钉扎特性

• 发表时间: 2009
• 作者: H.Fujishiro; T.Hiyama; T.Miura; T.Naito; S.Nariki; N.Sakai; I.Hirabayashi
• 通讯作者: I.Hirabayashi

Vortex pinning properties of (Y_La_x)-Ba-Cu-O and (Y_Pr_x)-Ba-Cu-O superconducting bulks

(Y_<1-x>La_x)-Ba-Cu-O和(Y_<1-x>Pr_x)-Ba-Cu-O超导体的涡旋钉扎特性

• 发表时间: 2009
• 作者: T.Naito; K.Sato; D.Yamaguchi; H.Fujishiro
• 通讯作者: H.Fujishiro

Enhancement of trapped field and total trapped flux on GdBaCuO bulk by MMPSC-IMRA method

MMPSC-IMRA 方法增强 GdBaCuO 块体上的俘获场和总俘获通量

• 发表时间: 2009
• 作者: H.Fujishiro; T.Hiyama; T.Naito; Y.Yanagi; Y.Itoh
• 通讯作者: Y.Itoh

Possible explanation for trapped field enhancement on REBaCuO bulk by modified multi-pulse technique with stepwise cooling (MMPSC)

通过改进的逐步冷却多脉冲技术 (MMPSC) 对 REBaCuO 块体俘获场增强的可能解释

• 发表时间: 2008
• 作者: H. Fujishiro; T. Hiyama; T. Naito; T. Tateiwa;Y. Yanagi
• 通讯作者: Y. Yanagi