Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Accepted Manuscript

Publication Date

6-1-2011

Journal or Book Title

Superconductor Science and Technology

Volume

24

First Page

065006

DOI

10.1088/0953-2048/24/6/065006

Abstract

Single crystals of K0.80Fe1.76Se2 were successfully grown from a ternary solution. We show that, although crystals form when cooling a near-stoichiometric melt, crystals are actually growing out of a ternary solution that remains liquid to at least 850 °C. We investigated their chemical composition, anisotropic magnetic susceptibility and resistivity, specific heat, thermoelectric power, London penetration depth and flux penetration via magneto-optical imaging. Whereas the samples appear to be homogeneously superconducting at low temperatures, there appears to be a broadened transition range close to Tc ~ 30 K that may be associated with small variations in stoichiometry.

Comments

This is a peer-reviewed, un-copyedited version of an article published in Superconductor Science and Technology. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at DOI: 10.1088/0953-2048/24/6/065006. Posted with permission.

Copyright Owner

IOP Publishing Ltd

Language

en

File Format

application/pdf

Published Version

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