NMR study of nematic spin fluctuations in a detwinned single crystal of underdoped Ba(Fe1−xCox)2As2

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 anisot...

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Published in:Physical review. B 2016-10, Vol.94 (16), p.165123
Main Authors: Kissikov, T, Dioguardi, A P, Timmons, E I, Tanatar, M A, Prozorov, R, Bud'ko, S L, Canfield, P C, Fernandes, R M, Curro, N J
Format: Article
Language:English
Subjects:
Anisotropy
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Crystal lattices
Data recovery
Material Science
NMR
Nuclear magnetic resonance
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Single crystals
Spin-lattice relaxation
Variation
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container_issue 16
container_start_page 165123
container_title Physical review. B
container_volume 94
creator Kissikov, T
Dioguardi, A P
Timmons, E I
Tanatar, M A
Prozorov, R
Bud'ko, S L
Canfield, P C
Fernandes, R M
Curro, N J
description 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.
doi_str_mv 10.1103/PhysRevB.94.165123
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subjects Anisotropy
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Crystal lattices
Data recovery
Material Science
NMR
Nuclear magnetic resonance
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Single crystals
Spin-lattice relaxation
Variation
title NMR study of nematic spin fluctuations in a detwinned single crystal of underdoped Ba(Fe1−xCox)2As2
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