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  Magnetic Ordering and Structural Transition in the Ordered Double-Perovskite Pb2NiMoO6

Zhao, J., Wang, X., Shen, X., Sahle, C. J., Dong, C., Hojo, H., et al. (2022). Magnetic Ordering and Structural Transition in the Ordered Double-Perovskite Pb2NiMoO6. Chemistry of Materials, 34, 97-106. doi:10.1021/acs.chemmater.1c02826.

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 Creators:
Zhao, Jinfa1, Author
Wang, Xiao2, Author              
Shen, Xiaoxiong1, Author
Sahle, Christoph J.1, Author
Dong, Cheng1, Author
Hojo, Hajime1, Author
Sakai, Yuki1, Author
Zhang, Jun1, Author
Li, Wenmin1, Author
Duan, Lei1, Author
Chan, Ting-chan1, Author
Chen, Chien-Te1, Author
Falke, Johannes2, Author              
Liu, Cheng-En2, Author              
Kuo, Chang-Yang1, Author
Deng, Zheng1, Author
Wang, Xiancheng1, Author
Yu, Richeng1, Author
Yu, Runze1, Author
Hu, Zhiwei3, Author              
Greenblatt, Marta1, AuthorJin, Changqing1, Author more..
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
3Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863461              

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Free keywords: Antiferromagnetism, Barium compounds, Nickel compounds, Perovskite, Specific heat, Strontium compounds, Temperature, X ray absorption, High pressure and high temperature, Magnetic ordering transitions, Monoclinic symmetry, Ordered double perovskites, Rock salt, Salt types, Space Groups, Structural transitions, Synchrotron powder X-ray diffractions, X-ray diffraction data, Lead compounds
 Abstract: The B-site-ordered double-perovskite Pb2NiMoO6 was prepared at high pressure and high temperature. The structural analysis of synchrotron powder X-ray diffraction data shows that Pb2NiMoO6 crystallizes into monoclinic symmetry with the space group Pc (no. 7), where the Ni and Mo ions are ordered in a rock-salt-type manner. The magnetic and specific heat characterizations reveal unusual two-step antiferromagnetic (AFM) transitions at 18 and 26 K for Pb2NiMoO6. The X-ray absorption spectra at the Ni-L2,3 edge and the Mo-L3 edge and the high-resolution partial fluorescence yield at the Pb-L3 edge indicate Pb2+2Ni2+Mo6+O6 valence states. Although in A2NiMoO6 (A = Sr2+, Pb2+, and Ba2+), the size of the A cation increases gradually from Sr2+ (1.44 Å) to Pb2+ (1.49 Å) to Ba2+ (1.61 Å), Pb2NiMoO6 exhibits much lower symmetry structure and AFM transition temperature, TN, compared with Sr2NiMoO6 (I4/m, TN = 81 K) and Ba2NiMoO6 (Fm3¯ m, TN = 64 K), which is attributed to the large distortion of NiO6 and MoO6 octahedra induced by the lone pair electron effect of Pb2+ with a 6s2 electronic configuration. Moreover, symmetry-breaking phase transition from a high-temperature centrosymmetric, cubic Fm3¯ m phase to a low-temperature non-centrosymmetric, monoclinic Pc phase was observed at 393-413 K in Pb2NiMoO6. © 2021 American Chemical Society.

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Language(s): eng - English
 Dates: 2022-01-132022-01-13
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1021/acs.chemmater.1c02826
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Title: Chemistry of Materials
  Abbreviation : Chem. Mater.
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Chemical Society
Pages: - Volume / Issue: 34 Sequence Number: - Start / End Page: 97 - 106 Identifier: ISSN: 0897-4756
CoNE: https://pure.mpg.de/cone/journals/resource/954925561571