Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

11-15-2013

Journal or Book Title

Physical Review B

Volume

111

Issue

20

First Page

207201

DOI

10.1103/PhysRevLett.111.207201

Abstract

We present 75As nuclear magnetic resonance data from measurements of a series of Ba(Fe1−xCox)2As2 crystals with 0.00≤x≤0.075 that reveals the coexistence of frozen antiferromagnetic domains and superconductivity for 0.060≤x≤0.071. Although bulk probes reveal no long range antiferromagnetic order beyond x=0.06, we find that the local spin dynamics reveal no qualitative change across this transition. The characteristic domain sizes vary by more than an order of magnitude, reaching a maximum variation at x=0.06. This inhomogeneous glassy dynamics may be an intrinsic response to the competition between superconductivity and antiferromagnetism in this system.

Comments

This article is published as Dioguardi, A. P., J. Crocker, A. C. Shockley, C. H. Lin, K. R. Shirer, D. M. Nisson, M. M. Lawson, N. apRoberts-Warren, P. C. Canfield, S. L. Bud’ko, S. Ran, and N. J. Curro. "Coexistence of cluster spin glass and superconductivity in Ba (Fe 1− x Co x) 2 As 2 for 0.060≤ x≤ 0.071." Physical Review Letters 111, no. 20 (2013): 207201. DOI: 10.1103/PhysRevLett.111.207201. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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