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  Os Doping Suppressed Cu-Fe Charge Transfer and Induced Structural and Magnetic Phase Transitions in LaCu3Fe4-xOsxO12 (x = 1 and 2)

Wang, X., Liu, Z., Ye, X., Zhou, B., Hu, Z., Wang, W., et al. (2021). Os Doping Suppressed Cu-Fe Charge Transfer and Induced Structural and Magnetic Phase Transitions in LaCu3Fe4-xOsxO12 (x = 1 and 2). Inorganic Chemistry, 60(9), 6298-6305. doi:10.1021/acs.inorgchem.1c00009.

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 Creators:
Wang, Xiao1, Author              
Liu, Zhehong2, Author
Ye, Xubin2, Author
Zhou, Bowen2, Author
Hu, Zhiwei3, Author              
Wang, Weipeng2, Author
Yu, Richeng2, Author
Agrestini, Stefano4, Author              
Zhou, Guanghui2, Author
Chen, Kai2, Author
Choueikani, Fadi2, Author
Ohresser, Philippe2, Author
Baudelet, François2, Author
Lin, Hong-Ji2, Author
Chen, Chien-Te2, Author
Tanaka, Arata2, Author
Weng, Shih-Chang2, Author
Long, Youwen2, Author
Affiliations:
1Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
2External Organizations, ou_persistent22              
3Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863461              
4Stefano Agrestini, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863459              

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 Abstract: B-site Os-doped quadruple perovskite oxides LaCu3Fe4-xOsxO12 (x = 1 and 2) were prepared under high-pressure and high-temperature conditions. Although parent compound LaCu3Fe4O12 experiences Cu-Fe intermetallic charge transfer that changes the Cu3+/Fe3+ charge combination to Cu2+/Fe3.75+ at 393 K, in the Os-doped samples, the Cu and Fe charge states are found to be constant 2+ and 3+, respectively, indicating the complete suppression of charge transfer. Correspondingly, Os6+ and mixed Os4.5+ valence states are determined by X-ray absorption spectroscopy for x = 1 and x = 2 compositions, respectively. The x = 1 sample crystallizes in an Fe/Os disordered structure with the Im3¯ space group. It experiences a spin-glass transition around 480 K. With further Os substitution up to x = 2, the crystal symmetry changes to Pn3¯, where Fe and Os are orderly distributed in a rocksalt-type fashion at the B site. Moreover, this composition shows a long-range Cu2+(↑)Fe3+(↑)Os4.5+(↓) ferrimagnetic ordering near 520 K. This work provides a rare example for 5d substitution-suppressed intermetallic charge transfer as well as induced structural and magnetic phase transitions with high spin ordering temperature. ©

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Language(s): eng - English
 Dates: 2021-04-132021-04-13
 Publication Status: Published in print
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1021/acs.inorgchem.1c00009
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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: 60 (9) Sequence Number: - Start / End Page: 6298 - 6305 Identifier: ISSN: 0020-1669
CoNE: https://pure.mpg.de/cone/journals/resource/0020-1669