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Intrinsic Triple Order in A-site Columnar-Ordered Quadruple Perovskites: Proof of Concept

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Title: Intrinsic Triple Order in A-site Columnar-Ordered Quadruple Perovskites: Proof of Concept
Authors: Belik, Alexei A. Browse this author
Khalyavin, Dmitry D. Browse this author
Zhang, Lei Browse this author
Matsushita, Yoshitaka Browse this author
Katsuya, Yoshio Browse this author
Tanaka, Masahiko Browse this author
Johnson, Roger D. Browse this author
Yamaura, Kazunari Browse this author →KAKEN DB
Keywords: high-pressure chemistry
materials science
perovskite phases
Issue Date: 5-Oct-2018
Publisher: Wiley-Blackwell
Journal Title: ChemPhysChem
Volume: 19
Issue: 19
Start Page: 2449
End Page: 2452
Publisher DOI: 10.1002/cphc.201800593
Abstract: There is an emerging topic in the science of perovskite materials: A-site columnar-ordered A(2)A'A '' B4O12 quadruple perovskites, which have an intrinsic triple order at the A sites. However, in many examples reported so far, A and A cations are the same, and the intrinsic triple order is hidden. Here, we investigate structural properties of Dy2CuMnMn4O12 (1) and Ho2MnGaMn4O12 (2) by neutron and X-ray powder diffraction and prove the triple order at the A sites. The cation distributions determined are [Ho-2](A)[Mn](A)[Ga0.66Mn0.34](A)[Mn3.66Ga0.34](B)O-12 and [Dy-2](A)[Cu0.73Mn0.27](A)[Mn0.80Dy0.20](A)[Mn1.89Cu0.11](B1)[Mn-2](B2)O-12. There are clear signatures of Jahn-Teller distortions in 1 and 2, and the orbital pattern is combined with an original type of charge ordering in 1. Columnar-ordered quadruple perovskites represent a new playground to study complex interactions between different electronic degrees of freedom. No long-range magnetic order was found in 2 by neutron diffraction, and its magnetic properties in low fields are dominated by an impurity with negative magnetization or magnetization reversal. On the other hand, 1 shows three magnetic transitions at 21, 125, and 160K.
Rights: This is the peer reviewed version of the following article: A. A. Belik, D. D. Khalyavin, L. Zhang, Y. Matsushita, Y. Katsuya, M. Tanaka, R. D. Johnson, K. Yamaura, ChemPhysChem 2018, 19, 2449, which has been published in final form at https://doi.org/10.1002/cphc.201800593. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Type: article (author version)
URI: http://hdl.handle.net/2115/75724
Appears in Collections:総合化学院 (Graduate School of Chemical Sciences and Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 山浦 一成

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