Magnetic form factor of SrFe$ 2$As$ 2$ - Condensed Matter > SuperconductivityReportar como inadecuado

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Abstract: Neutron diffraction measurements have been carried out to investigate themagnetic form factor of the parent SrFe2As2 system of the iron-basedsuperconductors. The general feature is that the form factor is approximatelyisotropic in wave vector, indicating that multiple d-orbitals of the iron atomsare occupied as expected based on band theory. Inversion of the diffractiondata suggests that there is some elongation of the spin density toward the Asatoms. We have also extended the diffraction measurements to investigate apossible jump in the c-axis lattice parameter at the structural phasetransition, but find no detectable change within the experimentaluncertainties.

Autor: W. Ratcliff II, P. A. Kienzle, Jeffrey W. Lynn, Shiliang Li, Pengcheng Dai, G. F. Chen, N. L. Wang


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