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Introducing a Large Polar Tetragonal Distortion into Ba-Doped BiFeO3by Low-Temperature Fluorination

Clemens, Oliver ; Kruk, Robert ; Patterson, Eric A. ; Loho, Christoph ; Reitz, Christian ; Wright, Adrian J. ; Knight, Kevin S. ; Hahn, Horst ; Slater, Peter R. (2014)
Introducing a Large Polar Tetragonal Distortion into Ba-Doped BiFeO3by Low-Temperature Fluorination.
In: Inorganic Chemistry, 53 (23)
doi: 10.1021/ic502183t
Article, Bibliographie

Abstract

This article reports on the synthesis and crystallographic and magnetic structure of barium-doped BiFeO3 compounds with approximate composition Bi(1-x)BaxFeO(3-x/2), as well as those of the fluorinated compounds Bi(1-x)BaxFeO(3-x)F(x) (both with x = 0.2, 0.3), prepared by low-temperature fluorination of the oxide precursors using polyvinylidenedifluoride. Whereas the oxide compounds were obtained as cubic (x = 0.2) and slightly tetragonal (x = 0.3, c/a approximate to 1.003) distorted perovskite compounds, a large tetragonal polar distortion was observed for the oxyfluoride compounds (c/a approximate to 1.08 for x = 0.2 and similar to 1.05 for x = 0.3), being isostructural to tetragonal PbTiO3. Although described differently in previous reports on Ba-doped BiFeO3, the observed remanent magnetization is found to agree well with the amount of BaFe12O19 only detectable by neutron diffraction and the well-known magnetic properties of BaFe12O19. The oxyfluoride compounds show G-type antiferromagnetic ordering with magnetic moments lying in the a/b plane.

Item Type: Article
Erschienen: 2014
Creators: Clemens, Oliver ; Kruk, Robert ; Patterson, Eric A. ; Loho, Christoph ; Reitz, Christian ; Wright, Adrian J. ; Knight, Kevin S. ; Hahn, Horst ; Slater, Peter R.
Type of entry: Bibliographie
Title: Introducing a Large Polar Tetragonal Distortion into Ba-Doped BiFeO3by Low-Temperature Fluorination
Language: English
Date: 1 December 2014
Publisher: ACS Publications
Journal or Publication Title: Inorganic Chemistry
Volume of the journal: 53
Issue Number: 23
DOI: 10.1021/ic502183t
Abstract:

This article reports on the synthesis and crystallographic and magnetic structure of barium-doped BiFeO3 compounds with approximate composition Bi(1-x)BaxFeO(3-x/2), as well as those of the fluorinated compounds Bi(1-x)BaxFeO(3-x)F(x) (both with x = 0.2, 0.3), prepared by low-temperature fluorination of the oxide precursors using polyvinylidenedifluoride. Whereas the oxide compounds were obtained as cubic (x = 0.2) and slightly tetragonal (x = 0.3, c/a approximate to 1.003) distorted perovskite compounds, a large tetragonal polar distortion was observed for the oxyfluoride compounds (c/a approximate to 1.08 for x = 0.2 and similar to 1.05 for x = 0.3), being isostructural to tetragonal PbTiO3. Although described differently in previous reports on Ba-doped BiFeO3, the observed remanent magnetization is found to agree well with the amount of BaFe12O19 only detectable by neutron diffraction and the well-known magnetic properties of BaFe12O19. The oxyfluoride compounds show G-type antiferromagnetic ordering with magnetic moments lying in the a/b plane.

Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Fachgebiet Materialdesign durch Synthese
11 Department of Materials and Earth Sciences > Material Science > Joint Research Laboratory Nanomaterials
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
Date Deposited: 16 Feb 2015 13:14
Last Modified: 12 Apr 2017 12:24
PPN:
Funders: H.H. appreciates the support of the State of Hesse by an equipment grant.
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