Abnormal magnetoresistance behavior in Nb thin films with rectangular arrays of antidots

Magnetoresistance in superconducting Nb films perforated with rectangular arrays of antidots （holes） is investigated at various temperatures and currents. Normally, the magnetoresistance increases with the increasing magnetic field. In this paper, we report a reverse behavior in a certain range of h...

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Published inChinese physics B Vol. 21; no. 7; pp. 487 - 490
Main Author 张伟君 何世坤 李博宏 程飞 许兵 温振超 曹文会 肖宏 韩秀峰 赵士平 邱祥冈
Format Journal Article
LanguageEnglish
Published 01.07.2012
Subjects
Antidots
Arrays
Fluid flow
Magnetic fields
Magnetoresistance
Magnetoresistivity
Niobium
Superconductivity
Thin films
Vortices
异常
矩形
磁电阻
薄膜
行为
阵列
非匹配
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ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/21/7/077401

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Summary:Magnetoresistance in superconducting Nb films perforated with rectangular arrays of antidots （holes） is investigated at various temperatures and currents. Normally, the magnetoresistance increases with the increasing magnetic field. In this paper, we report a reverse behavior in a certain range of high fields after vortex reconfiguration transition, where the resistances at non-matching fields are smaller than those in the low field regime. This phenomenon is due to a strong caging effect, in which the interstitial vortices are trapped among the pinned multiquanta vortices. This effect is temperature and current dependent.
Bibliography:Magnetoresistance in superconducting Nb films perforated with rectangular arrays of antidots （holes） is investigated at various temperatures and currents. Normally, the magnetoresistance increases with the increasing magnetic field. In this paper, we report a reverse behavior in a certain range of high fields after vortex reconfiguration transition, where the resistances at non-matching fields are smaller than those in the low field regime. This phenomenon is due to a strong caging effect, in which the interstitial vortices are trapped among the pinned multiquanta vortices. This effect is temperature and current dependent.
magnetoresistance, caging effect, rectangular arrays of antidots
Zhang Wei-Jun, He Shi-Kun, Li Bo-Hong Cheng Fei, Xu Bing, Wen Zhen-Chao, Cao Wen-Hui, Xiao Hong, Han Xiu-Feng Zhao Shi-Ping, and Qiu Xiang-Gang Beijing NationM Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences Beijing 100190, China
11-5639/O4
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/21/7/077401