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  Revisiting the Phase Transition of Magnetite under Pressure

Chen, K., Baudelet, F., Mijiti, Y., Nataf, L., Di Cicco, A., Hu, Z., et al. (2019). Revisiting the Phase Transition of Magnetite under Pressure. The Journal of Physical Chemistry C, 123, 21114-21119. doi:10.1021/acs.jpcc.9b04140.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-BDDF-D Version Permalink: http://hdl.handle.net/21.11116/0000-0004-BDE3-7
Genre: Journal Article

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 Creators:
Chen, K.1, Author
Baudelet, F.1, Author
Mijiti, Y.1, Author
Nataf, L.1, Author
Di Cicco, A.1, Author
Hu, Z.2, Author              
Agrestini, S.3, Author              
Komarek, A. C.4, Author              
Sougrati, M.1, Author
Haines, J.1, Author
Rouquette, J.1, Author
Kong, Q.1, Author
Weng, T.-C.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863461              
3Stefano Agrestini, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863459              
4Alexander Komarek, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863446              

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Free keywords: Dichroism; Iron; Iron oxides; Magnetic moments; Magnetite; X ray absorption; X ray absorption near edge structure spectroscopy, Magnetic circular dichroisms; Normal-spinel structure; Ordered magnetic moments; Pressure-induced phase transition; Stoichiometric magnetite; Structural transitions; Theoretical simulation; X-ray absorption near-edge structure spectra, Potassium compounds
 Abstract: Using a highly stoichiometric magnetite, the pressure-induced phase transitions of Fe3O4 have been revisited here by performing Fe K-edge X-ray absorption and magnetic circular dichroism measurements up to P = 65 GPa at room temperature and 71 GPa at 20 K. We have observed a structural transition at around 27 GPa from magnetite to a high-pressure phase h-Fe3O4 with the loss of the net ordered magnetic moments for both temperatures. The orthorhombic CaTi2O4-type (Bbmm) structure of the high-pressure phase h-Fe3O4 has been determined by combining experimental studies and theoretical simulations of the Fe K-edge X-ray absorption near-edge structure spectra. The long-time discussed pressure induced spin crossover, and inverse to normal spinel structure transitions in Fe3O4 can be deterministically excluded from the present study up to ∼65 GPa. © 2019 American Chemical Society.

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Language(s): eng - English
 Dates: 2019-07-312019-07-31
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1021/acs.jpcc.9b04140
 Degree: -

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Title: The Journal of Physical Chemistry C
  Abbreviation : J. Phys. Chem. C
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Chemical Society
Pages: - Volume / Issue: 123 Sequence Number: - Start / End Page: 21114 - 21119 Identifier: ISSN: 1932-7447
CoNE: https://pure.mpg.de/cone/journals/resource/954926947766