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Presence of magnetic excitations in SmFeAsO

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Pelliciari Jonathan, Dantz Marcus, Huang Yaobo, Strocov Vladimir N., Xing Lingyi, Wang Xiancheng, Jin Changqing, Schmitt Thorsten,
Project Coupled spin, charge and orbital dynamics of low-dimensional cuprates
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Original article (peer-reviewed)

Journal Applied Physics Letters
Volume (Issue) 109(12)
Page(s) 122601 - 122601
Title of proceedings Applied Physics Letters
DOI 10.1063/1.4962966


We measured dispersive spin excitations in SmFeAsO, a parent compound of SmFeAsO1−xFx and one of the highest temperature superconductors of Fe pnictides (TC ≈ 55 K). We determine the magnetic excitations to disperse with a bandwidth energy of ca 170 meV at (0.47, 0) and (0.34, 0.34), which merges into the elastic line approaching the Γ point. Comparing our results with other parent Fe pnictides, we show the importance of structural parameters for the magnetic excitation spectrum, with small modifications of the tetrahedron angles and As height strongly affecting the magnetism.