Antiferromagnetic ordering and structural phase transition in Ba2Fe2As2 with Sn incorporated from the growth flux

Su, Y.; Adelmann, P.; Johrendt, D.; Link, P.; Xiao, Y.; Meven, M.; Brückel, T.; Mittal, R.; Loewenhaupt, M.; Rotter, M.; Wolf, Th.; Schneidewind, A.

doi:10.1103/PhysRevB.79.064504

Journal Article

Antiferromagnetic ordering and structural phase transition in Ba2Fe2As2 with Sn incorporated from the growth flux

Su, Y.FZJ* ; Link, P. ; Schneidewind, A. ; Wolf, T. ; Adelmann, P. ; Xiao, Y.FZJ* ; Meven, M. ; Mittal, R.FZJ* ; Rotter, M. ; Johrendt, D. ; Brückel, T.FZJ* ; Loewenhaupt, M.

2009
APS College Park, Md.

Physical review / B 79(6), 064504 (2009) [10.1103/PhysRevB.79.064504]

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Please use a persistent id in citations: http://hdl.handle.net/2128/11056 doi:10.1103/PhysRevB.79.064504

Abstract: Antiferromagnetic ordering and structural phase transition have been investigated via comprehensive neutron and x-ray diffraction on Sn-flux-grown BaFe2As2 single crystals, the A-122 family of FeAs-based high-T-C superconductor compounds. The incorporation of Sn in the lattice resulted to an average composition of Ba0.95Sn0.05Fe2As2. A tetragonal-to-orthorhombic structural phase transition and a three-dimensional long-range antiferromagnetic ordering of the iron magnetic moment, with a unique magnetic propagation wave vector k=(1,0,1) have been found to take place at similar to 90 K. The magnetic moments of iron are aligned along the longer a axis in the low-temperature orthorhombic phase (Fmmm with b < a < c). Our results thus demonstrate that the magnetic structure of the Sn-flux-grown BaFe2As2 single crystal is the same as those in the polycrystalline samples and in other A-122 iron pnictides compounds. We argue that the Sn incorporation in the lattice is responsible for a smaller orthorhombic splitting and lower Neel temperature T-N observed in the experiments.

Keyword(s): J ; antiferromagnetic materials (auto) ; barium compounds (auto) ; crystal growth from solution (auto) ; crystal structure (auto) ; high-temperature superconductors (auto) ; iron compounds (auto) ; magnetic moments (auto) ; magnetic structure (auto) ; magnetic superconductors (auto) ; Neel temperature (auto) ; neutron diffraction (auto) ; solid-state phase transformations (auto) ; tin compounds (auto) ; X-ray diffraction (auto)