Bi-2223/Ag带材超导芯中网状弱超导区的磁光图像研究

1.北京大学物理系、人工微结构和介观物理国家重点实验室,北京,100871

2.北京大学物理系、人工微结构和介观物理国家重点实验室,北京,100871

3.北京大学物理系、人工微结构和介观物理国家重点实验室,北京,100871

4.北京大学物理系、人工微结构和介观物理国家重点实验室,北京,100871

5.西北有色金属研究总院,西安,710016

6.西北有色金属研究总院,西安,710016

7.西北有色金属研究总院,西安,710016

8.西北有色金属研究总院,西安,710016

9.西北有色金属研究总院,西安,710016

10.北京有色金属研究总院,北京,100088

11.北京有色金属研究总院,北京,100088

12.北京有色金属研究总院,北京,100088

基金项目: 科技部科研项目

WEB-LIKE WEAK SUPERCONDUCTING REGIONS IN Bi-2223/Ag TAPE OBSERVED MAGNETO-OPTIC IMAGES

多芯Bi-2223/Ag带材的磁光图象表明,剩余磁感应强度在超导芯中的分布呈现网状弱超导区.超导芯经超声波振荡后的碎片尺寸小于超导芯的宽度,暗示网状弱超导区可能是网状裂痕,这可能是限制Bi-2223/Ag带材超导电流的重要原因.

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