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LaMn3Ni2Mn2O12: An A- and B-Site Ordered Quadruple Perovskite with A-Site Tuning Orthogonal Spin Ordering

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Hu,  Zhiwei
Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Yin, Y.-Y., Liu, M., Dai, J.-H., Wang, X., Zhou, L., Cao, H., et al. (2016). LaMn3Ni2Mn2O12: An A- and B-Site Ordered Quadruple Perovskite with A-Site Tuning Orthogonal Spin Ordering. Chemistry of Materials, 28(24), 8988-8996. doi:10.1021/acs.chemmater.6b03785.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002C-566F-0
Abstract
A new oxide, LaMn3Ni2Mn2O12, was prepared by high-pressure and high-temperature synthesis methods. The compound crystallizes in an AA'3B2Bi2O12-tYPe Ai siteand B site ordered quadruple perovskite structure. The charge combination is confirmed to be LaMn33+Ni2 2Mn24+O12, where La and Mn3+ are 1:3 ordered at the A and A' sites and the Ni2+ and Mn4+ are also distributed at the B and B' sites in an orderly fashion in a rocksalt-type manner, respectively. A G-type antiferromagnetic ordering originating from the A'-site Mn3+-sublattice is found to occur at T-N approximate to C-Z% 46 K. Subsequently, the spin coupling between the B-site Ni' and B+-site Mn4+ sublattices leads to an orthogonally ordered spin alignment with a net ferromagnetic component near T-C approximate to 34 K First-principles calculations demonstrate that the A'-site Mn" spins play a crucial role in determining the spin structure of the B and B' sites. This LaMn3Ni2Mn2O12 provides a rare example that shows orthogonal spin ordering in the B and B' sites assisted by ordered A-site magnetic ions in perovskite systems.