標題: Pinning effects induced by periodic arrays of structural corrugations in Nb thin films
作者: Horng, L
Wu, JC
Kang, PC
Lin, PH
Wu, TC
電子物理學系
Department of Electrophysics
關鍵字: matching effect;pinning array;structural corrugation;thin film
公開日期: 1-五月-2003
摘要: Artificial vortex pinning arrays have been fabricated by electron-beam lithography in conjunction with reactive ion etching in Nb superconducting thin films in order to investigate flux pinning. Based on the structural corrugation in the Nb thin film, the square lattice of defects that act as pinning centers was created. A strong periodic pinning effect, as the vortex lattice matches the array of defects, can be observed in the evolution of resistivity and critical current with the applied magnetic fields in the mixed state of the Nb film, thus, revealing a synchronized pinning effect due to structural corrugation. This result is in agreement with the resistivity-temperature curves at matching fields and half-integer matching fields in which a crossover occurs for temperatures exceeding a certain threshold value. The phenomenon is related to the presence of the pinning structure at matching fields.
URI: http://dx.doi.org/10.1143/JJAP.42.2679
http://hdl.handle.net/11536/27892
ISSN: 0021-4922
DOI: 10.1143/JJAP.42.2679
期刊: JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS
Volume: 42
Issue: 5A
起始頁: 2679
結束頁: 2680
顯示於類別:期刊論文


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  1. 000183744900025.pdf