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Magnetic and structural transitions in the iron-chalcogenide high-Tc superconductor: K0.8Fe1.76Se2.00
Journal of Applied Physics
  • W. N. Rowan-Weetaluktuk, McGill University
  • D. H. Ryan, McGill University
  • J. M. Cadogan, University of Manitoba
  • R. Hu, Iowa State University
  • Sergey L. Bud'ko, Iowa State University
  • Paul C. Canfield, Iowa State University
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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.

The following article appeared in Journal of Applied Physics 111 (2012): 07E126 and may be found at

Copyright 2012 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
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American Institute of Physics
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W. N. Rowan-Weetaluktuk, D. H. Ryan, J. M. Cadogan, R. Hu, et al.. "Magnetic and structural transitions in the iron-chalcogenide high-Tc superconductor: K0.8Fe1.76Se2.00" Journal of Applied Physics Vol. 111 Iss. 7 (2012) p. 07E126
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