1. Symmetry-breaking 60°-spin order in the A-site-ordered perovskite LaMn3V4O12.
- Author
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Takashi Saito, Masayuki Toyoda, Clemens Ritter, Shoubao Zhang, Tamio Oguchi, Paul Attfield, J., and Yuichi Shimakawa
- Subjects
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SYMMETRY breaking , *MAGNETIC properties of perovskite , *LANTHANUM manganese oxide , *NEUTRON diffraction , *HEISENBERG model - Abstract
The magnetism of the A-site-ordered perovskite LaMm3V4O12 is studied comprehensively by means of neutron powder diffraction experiments and theoretical calculations. Magnetic neutron diffraction results show that a rhombohedral 60° spin structure emerges on the cubic lattice below a 44-K Néel transition. Ab initio electronic structure calculations confirm that high-spin Mn2+ moments are localized while V 3d-band states are itinerant, and that the noncollinear 60° spin structure is more stable than collinear ferromagnetic or G-type antiferromagnetic alternatives. Effective Heisenberg model calculations reveal that the appearance of such a nontrivial spin structure can be attributed to significant next-nearest-neighbor and third-nearest-neighbor magnetic interactions. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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