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  Antiferroelectricity-Induced Negative Thermal Expansion in Double Perovskite Pb2CoMoO6

Zhao, H., Pan, Z., Shen, X., Zhao, J., Lu, D., Zhang, J., et al. (2024). Antiferroelectricity-Induced Negative Thermal Expansion in Double Perovskite Pb2CoMoO6. Small, 20(2): 2305219, pp. 1-8. doi:10.1002/smll.202305219.

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 Creators:
Zhao, Haoting1, Author
Pan, Zhao1, Author
Shen, Xi1, Author
Zhao, Jianfa1, Author
Lu, Dabiao1, Author
Zhang, Jie1, Author
Hu, Zhiwei2, Author           
Kuo, Chang-Yang1, Author
Chen, Chien-Te1, Author
Chan, Ting-Shan1, Author
Sahle, Christoph J.1, Author
Dong, Cheng1, Author
Nishikubo, Takumi1, Author
Koike, Takehiro1, Author
Deng, Zun-Yi1, Author
Hong, Jiawang1, Author
Yu, Runze1, Author
Yu, Pu1, Author
Azuma, Masaki1, Author
Jin, Changqing1, Author
Long, Youwen1, Author more..
Affiliations:
1External Organizations, ou_persistent22              
2Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863461              

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Free keywords: antiferroelectricity, double perovskites, high-pressure synthesis, negative thermal expansion
 Abstract: Abstract Materials with negative thermal expansion (NTE) attract significant research attention owing to their unique physical properties and promising applications. Although ferroelectric phase transitions leading to NTE are widely investigated, information on antiferroelectricity-induced NTE remains limited. In this study, single-crystal and polycrystalline Pb2CoMoO6 samples are prepared at high pressure and temperature conditions. The compound crystallizes into an antiferroelectric Pnma orthorhombic double perovskite structure at room temperature owing to the opposite displacements dominated by Pb2+ ions. With increasing temperature to 400 K, a structural phase transition to cubic Fm-3m paraelectric phase occurs, accompanied by a sharp volume contraction of 0.41%. This is the first report of an antiferroelectric-to-paraelectric transition-induced NTE in Pb2CoMoO6. Moreover, the compound also exhibits remarkable NTE with an average volumetric coefficient of thermal expansion αV = ?1.33 ? 10?5 K?1 in a wide temperature range of 30?420 K. The as-prepared Pb2CoMoO6 thus serves as a prototype material system for studying antiferroelectricity-induced NTE.

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Language(s): eng - English
 Dates: 2024-01-112024-01-11
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1002/smll.202305219
 Degree: -

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Title: Small
  Other : Small
Source Genre: Journal
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Publ. Info: Weinheim, Germany : Wiley-VCH
Pages: - Volume / Issue: 20 (2) Sequence Number: 2305219 Start / End Page: 1 - 8 Identifier: ISSN: 1613-6810
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000017440_1