Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

2-1-2012

Journal or Book Title

Physical Review B

Volume

85

Issue

6

First Page

064511

DOI

10.1103/PhysRevB.85.064511

Abstract

The upper critical fields H-c2(T) of single crystals of Sr1-xEux(Fe0.89Co0.11)(2)As-2 (x = 0.20 and 0.46) were determined by radio-frequency penetration depth measurements in pulsed magnetic fields. H-c2(T) approaches the Pauli limiting field but shows an upward curvature with an enhancement from the orbital limited field, as inferred from the Werthamer-Helfand-Hohenberg theory. We discuss the temperature dependence of the upper critical fields and the decreasing anisotropy using a two-band BCS model.

Comments

This article is published as Hu, Rongwei, Eun Deok Mun, M. M. Altarawneh, C. H. Mielke, V. S. Zapf, S. L. Bud'ko, and P. C. Canfield. "Upper critical fields and two-band superconductivity in Sr 1− x Eu x (Fe 0.89 Co 0.11) 2 As 2 (x= 0.20 and 0.46)." Physical Review B 85, no. 6 (2012): 064511. DOI: 10.1103/PhysRevB.85.064511. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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