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Magnetic and structural transitions in the iron-chalcogenide high-T-c superconductor: K0.8Fe1.76Se2.00

TitleMagnetic and structural transitions in the iron-chalcogenide high-T-c superconductor: K0.8Fe1.76Se2.00
Publication TypeJournal Article
Year of Publication2012
AuthorsRowan-Weetaluktuk WN, Ryan DH, Cadogan JM, Hu R, Bud'ko SL, Canfield PC
Journal TitleJournal of Applied Physics
Volume111
Pages07e126
Date Published04
Type of ArticleArticle
ISBN Number0021-8979
Accession NumberWOS:000303282401239
Abstract

Fe-57 Mossbauer spectroscopy was used to study single-crystals of K0.8Fe1.76Se2.00 from 6K to 673 K. At 6K, the hyperfine field (B-hf) is canted away from the c-axis by 18 +/- 3 degrees. The temperature dependence of B-hf follows a spin wave model with a spin excitation gap of 9 +/- 1 meV. A sudden increase in the linewidth and a corresponding drop in (1/2)eQV(zz) at T-N - 532K are indications of strong coupling between the magnetic and structural transitions. (C) 2012 American Institute of Physics. [doi:10.1063/1.3673848]
URL<Go to ISI>://WOS:000303282401239
DOI10.1063/1.3673848
Alternate JournalJ. Appl. Phys.