Low-field vortex patterns in the multiband BaFe${}_{2\ensuremath{-}\mathrm{x}}$Ni${}_{\mathrm{x}}$As${}_{2}$ superconductor (x $=$ 0.1, 0.16)

Low-field vortex patterns in the multiband BaFe $_{2 - x}$ Ni $_{x}$ As $_{2}$ superconductor (x $=$ 0.1, 0.16)

L. J. Li, T. Nishio, Z. A. Xu, and V. V. Moshchalkov

Phys. Rev. B 83, 224522 – Published 29 June 2011

Abstract

The distribution of vortices at low magnetic fields in single crystals of multiband BaFe $_{2 - x}$ Ni $_{x}$ As $_{2}$ (x $=$ 0.1 and x $=$ 0.16) superconductors is studied by Bitter decoration. Highly inhomogeneous vortex patterns, including vortex stripes and vortex clusters, are observed. The origin of these inhomogeneous vortex arrays is likely to be due to strong flux pinning, as suggested by magnetization measurements performed at high fields. Alternative possible scenarios, such as type-1.5 superconductivity due to multiband effect, are also discussed.

Received 4 December 2010

DOI:https://doi.org/10.1103/PhysRevB.83.224522

Authors & Affiliations

L. J. Li^1,*, T. Nishio², Z. A. Xu³, and V. V. Moshchalkov^1,†

¹INPAC—Institute for Nanoscale Physics and Chemistry, KULeuven, Celestijnenlaan 200D, Leuven 3001, Belgium
²Department of Physics, Tokyo University of Science, Shinjuku, Tokyo 162-8601, Japan
³Physics Department, Zhejiang University, Hangzhou 310027, China

^*linjunli1981@gmail.com
^†victor.Moshchalkov@fys.kuleuven.be

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand

Issue

Vol. 83, Iss. 22 — 1 June 2011

Reuse & Permissions

Access Options

Author publication services for translation and copyediting assistance advertisement

Physical Review B

covering condensed matter and materials physics

Low-field vortex patterns in the multiband BaFe $_{2 - x}$ Ni $_{x}$ As $_{2}$ superconductor (x $=$ 0.1, 0.16)

L. J. Li, T. Nishio, Z. A. Xu, and V. V. Moshchalkov

Phys. Rev. B 83, 224522 – Published 29 June 2011

Abstract

Authors & Affiliations

Article Text (Subscription Required)

References (Subscription Required)

Issue

Access Options

Physical Review B

covering condensed matter and materials physics

Low-field vortex patterns in the multiband BaFe2−xNixAs2 superconductor (x = 0.1, 0.16)

L. J. Li, T. Nishio, Z. A. Xu, and V. V. Moshchalkov

Phys. Rev. B 83, 224522 – Published 29 June 2011

Abstract

Authors & Affiliations

Article Text (Subscription Required)

References (Subscription Required)

Issue

Access Options

Authorization Required

Other Options

Download & Share

Images

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Log In

Search

Article Lookup

Paste a citation or DOI

Enter a citation

Low-field vortex patterns in the multiband BaFe $_{2 - x}$ Ni $_{x}$ As $_{2}$ superconductor (x $=$ 0.1, 0.16)