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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
Physical review. B, 10/2016, Letnik: 94, Številka: 16Journal Article
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.
