Visualization of vortex motion in FeAs-based BaFe1.9Ni0.1As2 single crystal by means of magneto-optical imaging

Authors

Zhi W. Lin, Univ Technol Sydney
Yong Jian Li, Univ of Technology Sydney
Jian G. Zhu, Univ Technol Sydney
Xiaolin Wang, University of WollongongFollow
S. X. Dou, University of WollongongFollow
Youguang Guo, Univ of Technology Sydney
Gang Lei, University of Technology Sydney
Yi Wang, University of Technology Sydney
Matthew Philips, University of Technology Sydney
Michael Cortie, Inst for Nanoscale Tech, UTS
Yan-Cheng Li, University of Technology Sydney
Ki-Young Choi, Sogang University Seoul
Xun Shi, Shanghai Institute of Ceramics China

RIS ID

37707

Publication Details

Lin, Z. W., Li, Y., Zhu, J. G., Wang, X., Dou, S. Xue., Guo, Y., Lei, G., Wang, Y., Philips, M., Cortie, M., Li, Y., Choi, K. & Shi, X. (2011). Visualization of vortex motion in FeAs-based BaFe1.9Ni0.1As2 single crystal by means of magneto-optical imaging. Journal of applied physics, 109 (7), 07E142-07E145.

Abstract

Superconductivity has been found in newly discovered iron-based compounds. This paper studies the motion of magnetic vortices in BaFe_1.9Ni_0.1As₂ single crystal by means of the magneto-optical imaging technique. A series of magneto-optical images reflecting magnetic flux distribution at the crystal surface were taken when the crystal was zero-field cooled to 10 K. The behavior of the vortices, including penetration into and expulsion from the single crystal with increasing and decreasing external fields, respectively, is discussed. The motion behavior is similar to that observed in high-T_c superconducting cuprates with strong vortex pinning; however, the flux-front is irregular due to randomly distributed defects in the crystal.

Grant Number

ARC/DP0770205, ARC/LX0882225

Additional Grant Number

http://purl.org/au-research/grants/ARC/DP0770205

http://purl.org/au-research/grants/ARC/LX0882225