Campus Units
Physics and Astronomy, Ames Laboratory
Document Type
Article
Publication Version
Published Version
Publication Date
7-1-2015
Journal or Book Title
Physical Review B
Volume
92
Issue
1
First Page
014517
DOI
10.1103/PhysRevB.92.014517
Abstract
We present a local probe study of the magnetic superconductor ErNi2B2C, using magnetic force microscopy at sub-Kelvin temperatures. ErNi2B2C is an ideal system to explore the effects of concomitant superconductivity and ferromagnetism. At 500 mK, far below the transition to a weakly ferromagnetic state, we directly observe a structured magnetic background on the micrometer scale. We determine spatially resolved absolute values of the magnetic penetration depth λ and study its temperature dependence as the system undergoes magnetic phase transitions from paramagnetic to antiferromagnetic, and to weak ferromagnetic, all within the superconducting regime. In addition, we estimate the absolute pinning force of Abrikosov vortices, which shows a position dependence and temperature dependence as well, and discuss the possibility of the purported spontaneous vortex formation.
Copyright Owner
American Physical Society
Copyright Date
2015
Language
en
File Format
application/pdf
Recommended Citation
Wulferding, Dirk; Yang, Ilkyu; Yang, Jinho; Lee, Minkyung; Choi, Hee Cheul; Bud’ko, Sergey L.; Canfield, Paul C.; Yeom, Han Woong; and Kim, Jeehoon, "Spatially resolved penetration depth measurements and vortex manipulation in the ferromagnetic superconductor ErNi2 B2C" (2015). Physics and Astronomy Publications. 588.
https://lib.dr.iastate.edu/physastro_pubs/588
Comments
This article is published as Wulferding, Dirk, Ilkyu Yang, Jinho Yang, Minkyung Lee, Hee Cheul Choi, Sergey L. Bud'ko, Paul C. Canfield, Han Woong Yeom, and Jeehoon Kim. "Spatially resolved penetration depth measurements and vortex manipulation in the ferromagnetic superconductor ErNi2B2C." Physical Review B 92, no. 1 (2015): 014517. DOI: 10.1103/PhysRevB.92.014517. Posted with permission.