Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

10-15-2016

Journal or Book Title

Physical Review B

Volume

94

Issue

16

First Page

165123

DOI

10.1103/PhysRevB.94.165123

Abstract

We report the experimental details of how mechanical detwinning can be implemented in tandem with high-sensitivity nuclear magnetic resonance measurements and use this setup to measure the in-plane anisotropy of the spin-lattice relaxation rate in underdoped Ba(Fe1−xCox )2As2 with x = 0.048. The anisotropy reaches a maximum of 30% at TN, and the recovery data reveal that the glassy behavior of the spin fluctuations present in the twinned state persist in the fully detwinned crystal. A theoretical model is presented to describe the spin-lattice relaxation rate in terms of anisotropic nematic spin fluctuations.

Comments

This article is published as Kissikov, T., A. P. Dioguardi, E. I. Timmons, M. A. Tanatar, R. Prozorov, S. L. Bud'ko, P. C. Canfield, R. M. Fernandes, and N. J. Curro. "NMR study of nematic spin fluctuations in a detwinned single crystal of underdoped Ba(Fe1−xCox)2As2." Physical Review B 94, no. 16 (2016): 165123. DOI: 10.1103/PhysRevB.94.165123. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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