Spin and dipole order in geometrically frustrated mixed-valence manganite Pb3Mn7O15
- Ivanov, Sergey A.
- Bush, A. A.
- Hudl, M.
- Stash, A. I.
- Andre, G.
- Tellgren, Roland
- Cherepanov, V. M.
- Stepanov, A. V.
- Kamentsev, K. E.
- Tokunaga, Y.
- Taguchi, Y.
- Tokura, Y.
- Nordblad, Per
- Mathieu, Roland
DOIAbstract
The structural, magnetic, and dielectric properties of Pb3Mn7O15 have been investigated using high-quality single crystals. Pb3Mn7O15 adopts a pseudo-hexagonal orthorhombic structure, with partially filled Kagom, layers connected by ribbons of edge-sharing MnO6 octahedra and intercalated Pb cations. There are 9 inequivalent sites in the structure for the Mn ions, which exist both as Mn3+ and Mn4+. Pb3Mn7O15 undergoes an antiferromagnetic transition below T-N similar to 67 K, with significant geometric frustration. Neutron powder diffraction on crushed single crystals allowed us to determine the low-temperature antiferromagnetic magnetic structure. We discuss the magnetic interaction pathways in the structure and possible interplay between t...
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