Single-vortex pinning and penetration depth in superconducting NdFeAsO1-xFx
SCIE
SCOPUS
- Title
- Single-vortex pinning and penetration depth in superconducting NdFeAsO1-xFx
- Authors
- Zhang, JT; KIM, JEE HOON; Huefner, M; Ye, C; Kim, S; Canfield, PC; Prozorov, R; Auslaender, OM; Hoffman, JE
- Date Issued
- 2015-10-12
- Publisher
- AMERICAN PHYSICAL SOCIETY
- Abstract
- We use a magnetic force microscope (MFM) to investigate single-vortex pinning and penetration depth in NdFeAsO1-xFx, one of the highest-T-c iron-based superconductors. In fields up to 20 G, we observe a disordered vortex arrangement, implying that the pinning forces are stronger than the vortex-vortex interactions. We measure the typical force to depin a single vortex, F-depin similar or equal to 4.5 pN, corresponding to a critical current up to J(c) similar or equal to 7 x 10(5) A/cm(2). Furthermore, our MFM measurements allow the first local and absolute determination of the superconducting in-plane penetration depth in NdFeAsO1-x F-x, lambda(ab) = 320 +/- 60 nm, which is larger than previous bulk measurements.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/35694
- DOI
- 10.1103/PHYSREVB.92.134509
- ISSN
- 1098-0121
- Article Type
- Article
- Citation
- PHYSICAL REVIEW B, vol. 92, no. 13, page. 134509, 2015-10-12
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- There are no files associated with this item.
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