Neutron diffraction on antiferromagnetic ordering in single-crystal BaFe2As2

Details Neutron diffraction on antiferromagnetic ordering in single-crystal BaFe2As2 Neutron diffraction on antiferromagnetic ordering in single-crystal BaFe2As2

2008-07-10

arxiv.org/abs/0807.1743v3

Phys. Rev. B 79, 064504 (2009)

Physics

Condensed Matter

Superconductivity

Substantial changes have been made based on the results obtained from a new crystal

Scientific paper

10.1103/PhysRevB.79.064504

Neutron diffraction experiments have been carried out on a Sn-flux grown BaFe2As2 single crystal, the parent compound of the A-122 family of FeAs-based high-Tc superconductors. A tetragonal to orthorhombic structural phase transition and a three dimensional long-range antiferromagnetic ordering of the iron moment, with a unique magnetic propagation wavevector k = (1, 0, 1), have been found to take place at ~90 K. The magnetic moments of iron are aligned along the long a axis in the low temperature orthorhombic phase (Fmmm with b

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