Crossover behaviors in magnetoresistance oscillations for Nb thin film with rectangular arrays of antidots

被引：15

作者：

Zhang, W. J. ^{[1
]}

He, S. K. ^{[1
]}

Liu, H. F. ^{[1
]}

Xue, G. M. ^{[1
]}

Xiao, H. ^{[1
]}

Li, B. H. ^{[1
]}

Wen, Z. C. ^{[1
]}

Han, X. F. ^{[1
]}

Zhao, S. P. ^{[1
]}

Gu, C. Z. ^{[1
]}

Qiu, X. G. ^{[1
]}

Moshchalkov, Victor V. ^{[2
]}

机构：

[1] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China

[2] Katholieke Univ Leuven, INPAC Inst Nanoscale Phys & Chem, B-3001 Louvain, Belgium

来源：

EPL | 2012年 / 99卷 / 03期

基金：

美国国家科学基金会;

关键词：

UPPER CRITICAL-FIELD; SUPERCONDUCTING NETWORK; VORTEX; LATTICE; FRUSTRATION; VORTICES;

D O I：

10.1209/0295-5075/99/37006

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Superconducting Nb thin films with rectangular arrays of submicron antidots (holes) have been systemically investigated by transport measurements. A series of crossover behaviors is found in magnetoresistance oscillations, corresponding to three different superconducting states: the wire network-like state, the interstitial vortex state and the single-loop-like state. These states are identified by the field intervals and hysteretic effect. The crossover fields between them are found to be both temperature and geometry dependent. Furthermore, in dense arrays, the saturation number is distinctly larger than the theoretical calculation for a single insulating inclusion. Our results indicate that in the process of magnetic field penetration into nanostructured superconductors, the order parameters are strongly modulated and finally localized near the edges, resulting in changes of oscillation modes. Copyright (C) EPLA, 2012

引用

页数：6

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