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Magnetic structure of the swedenborgite compound CaBaMn2Fe2O7 derived by powder neutron diffraction and Mössbauer spectroscopy

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Adler,  P.
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Qureshi, N., Morrow, R., Valldor, M., Puente-Orench, I., & Adler, P. (2022). Magnetic structure of the swedenborgite compound CaBaMn2Fe2O7 derived by powder neutron diffraction and Mössbauer spectroscopy. Physical Review B, 106(14): 144428, pp. 1-9. doi:10.1103/PhysRevB.106.144428.


Cite as: https://hdl.handle.net/21.11116/0000-000C-393F-F
Abstract
We present a study combining neutron diffraction and Fe57 Mössbauer spectroscopy on a powder sample of CaBaMn2Fe2O7 belonging to the large family of swedenborgite compounds. The undistorted hexagonal crystal structure (space group P63mc) is preserved down to low temperatures, and all employed techniques reveal a transition into a magnetically long-range ordered phase at TN = 205 K. The magnetic Bragg peak intensities from the powder diffraction patterns together with a symmetry analysis of the employed models unambiguously reveal the classical 3×3 magnetic structure on a hexagonal lattice with propagation vector q=(13130). The nuclear Bragg peak intensities allowed the statistical distribution of Fe and Mn ions on both trigonal and kagome sites of the complex swedenborgite structure to be analyzed which was considered to explain the complex shape of the Mössbauer spectra. © 2022 American Physical Society.