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

doi:10.1088/1674-1056/21/7/077401

Abstract 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.

Keywords: magnetoresistance caging effect rectangular arrays of antidots

Received: 27 February 2012
Revised: 11 April 2012
Accepted manuscript online:

PACS:	74.25.F-	(Transport properties)
	74.25.Uv	(Vortex phases (includes vortex lattices, vortex liquids, and vortex glasses))
	74.78.Na	(Mesoscopic and nanoscale systems)

Fund: Project supported by the National Basic Research Program of China (Grant Nos. 2009CB929100, 2011CBA00107, and 2012CB921302) and the National Science Foundation of China (Grant Nos. 10974241 and 11104335).

Corresponding Authors: Qiu Xiang-Gang
E-mail: xgqiu@iphy.ac.cn

Cite this article:

Zhang Wei-Jun(张伟君), He Shi-Kun(何世坤), Li Bo-Hong(李博宏), Cheng Fei(程飞), Xu Bing(许兵), Wen Zhen-Chao(温振超), Cao Wen-Hui(曹文会), Xiao Hong(肖宏), Han Xiu-Feng(韩秀峰), Zhao Shi-Ping(赵士平), and Qiu Xiang-Gang(邱祥冈) Abnormal magnetoresistance behavior in Nb thin film with rectangular arrays of antidots 2012 Chin. Phys. B 21 077401

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

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