Campus Units
Physics and Astronomy, Ames Laboratory
Document Type
Article
Publication Version
Published Version
Publication Date
10-1-2015
Journal or Book Title
Physical Review B
Volume
92
Issue
13
First Page
134509
DOI
10.1103/PhysRevB.92.134509
Abstract
We use a magnetic force microscope (MFM) to investigate single-vortex pinning and penetration depth in NdFeAsO1−xFx, one of the highest-Tc 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, Fdepin≃4.5 pN, corresponding to a critical current up to Jc≃7×105 A/cm2. Furthermore, our MFM measurements allow the first local and absolute determination of the superconducting in-plane penetration depth in NdFeAsO1−xFx,λab=320±60 nm, which is larger than previous bulk measurements.
Copyright Owner
American Physical Society
Copyright Date
2015
Language
en
File Format
application/pdf
Recommended Citation
Zhang, Jessie T.; Kim, Jeehoon; Huefner, Magdalena; Ye, Cun; Kim, Stella; Canfield, Paul C.; Prozorov, Ruslan; Auslaender, Ophir M.; and Hoffman, Jennifer E., "Single-vortex pinning and penetration depth in superconducting NdFeAsO1-xFx" (2015). Physics and Astronomy Publications. 582.
https://lib.dr.iastate.edu/physastro_pubs/582
Comments
This article is published as Zhang, Jessie T., Jeehoon Kim, Magdalena Huefner, Cun Ye, Stella Kim, Paul C. Canfield, Ruslan Prozorov, Ophir M. Auslaender, and Jennifer E. Hoffman. "Single-vortex pinning and penetration depth in superconducting NdFeAsO 1− x F x." Physical Review B 92, no. 13 (2015): 134509. DOI: 10.1103/PhysRevB.92.134509. Posted with permission.