Physics and Astronomy, Ames Laboratory
Journal or Book Title
Physical Review B
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.
American Physical Society
Kissikov, T.; Dioguardi, A. P.; Timmons, Erik I.; Tanatar, Makariy A.; Prozorov, Ruslan; Bud’ko, Sergey L.; Canfield, Paul C.; Fernandes, R. M.; and Curro, N. J., "NMR study of nematic spin fluctuations in a detwinned single crystal of underdoped Ba(Fe1−xCox)2As2" (2016). Physics and Astronomy Publications. 563.