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  High-Pressure Synthesis of a B-site Co2+/Mn4+Disordered Quadruple Perovskite LaMn3Co2Mn2O12

Guo, J., Shen, X., Liu, Z., Qin, S., Wang, W., Ye, X., et al. (2020). High-Pressure Synthesis of a B-site Co2+/Mn4+Disordered Quadruple Perovskite LaMn3Co2Mn2O12. Inorganic Chemistry, 59, 12445-12452. doi:10.1021/acs.inorgchem.0c01548.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0007-0E40-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0007-1035-B
Genre: Journal Article
Alternative Title : Inorganic Chemistry

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 Creators:
Guo, J.1, Author
Shen, X.1, Author
Liu, Z.1, Author
Qin, S.1, Author
Wang, W.1, Author
Ye, X.1, Author
Liu, G.1, Author
Yu, R.1, Author
Lin, H.-J.1, Author
Chen, C.-T.1, Author
Tjeng, Liu-Hao2, Author              
Hu, Zhiwei3, Author              
Long, Y.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Liu Hao Tjeng, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863452              
3Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863461              

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 Abstract: A new oxide, LaMn3Co2Mn2O12, was synthesized under high-pressure (7 GPa) and high-temperature (1423 K) conditions. The compound crystallizes in an AA′3B4O12-type quadruple perovskite structure with space group Im3¯. The Rietveld structural analysis combined with soft X-ray absorption spectroscopy reveals the charge combination to be LaMn3+3Co2+2Mn4+2O12, where the La3+ and Mn3+ are 1:3 ordered respectively at the A and A′ sites, whereas the Co2+ and Mn4+ are disorderly distributed at the B site. This is in sharp contrast to R2Co2+Mn4+O6 (R = La and rare earth) double perovskites, in which the Co2+ and Mn4+ charge states are always orderly distributed with a rocksalt-type fashion, giving rise to a long-range magnetic ordering. As a result, LaMn3Co2Mn2O12 displays spin glassy magnetic properties due to the random Co2+ and Mn4+ distribution, as demonstrated by dc and ac magnetic susceptibility as well as specific heat measurements. Possible factors that affect the B-site degree of order in perovskite structures are discussed. © 2020 American Chemical Society.

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Language(s): eng - English
 Dates: 2020-08-122020-08-12
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1021/acs.inorgchem.0c01548
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Title: Inorganic Chemistry
  Abbreviation : Inorg. Chem.
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 59 Sequence Number: - Start / End Page: 12445 - 12452 Identifier: ISSN: 0020-1669
CoNE: https://pure.mpg.de/cone/journals/resource/0020-1669