Journal or Book Title
Journal of Applied Physics
57Fe Mössbauer spectroscopy was used to study single-crystals of K0.8Fe1.76Se2.00 from 6 K to 673 K. At 6 K, the hyperfine field (B hf) is canted away from the c-axis by 18 ± 3°. The temperature dependence of B hf follows a spin wavemodel with a spin excitation gap of 9 ± 1 meV. A sudden increase in the linewidth and a corresponding drop in (1/2)eQVzz at TN = 532 K are indications of strong coupling between the magnetic and structural transitions.
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American Institute of Physics
Rowan-Weetaluktuk, W. N.; Ryan, D. H.; Cadogan, J. M.; Hu, R.; Bud'ko, Sergey L.; and Canfield, Paul C., "Magnetic and structural transitions in the iron-chalcogenide high-Tc superconductor: K0.8Fe1.76Se2.00" (2012). Ames Laboratory Publications. 218.