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Article
Magnetic and structural transitions in the iron-chalcogenide high-Tc superconductor: K0.8Fe1.76Se2.00
US Department of Energy Publications
  • W. N. Rowan-Weetaluktuk, McGill University
  • D. H. Ryan, McGill University
  • J. M. Cadogan, University of Manitoba
  • R. Hu, Iowa State University
  • S. L. Bud’ko, Iowa State University
  • Paul C. Canfield, Iowa State University
Date of this Version
1-1-2012
Citation

Journal Of Applied Physics 111, 07e126 (2012); doi:10.1063/1.3673848

Abstract

57Fe Mössbauer spectroscopy was used to study single-crystals of K0.8Fe1.76Se2.00 from 6K to 673 K. At 6 K, the hyperfine field (Bhf) is canted away from the c-axis by 18±3°. The temperature dependence of Bhf follows a spin wave model with a spin excitation gap of 9±1 meV. A sudden increase in the line width and a corresponding drop in (1/2)eQVzz at TN = 532 K are indications of strong coupling between the magnetic and structural transitions.

Citation Information
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" (2012)
Available at: http://works.bepress.com/paul_canfield/78/