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), pp. 12572-12583. ACS Publications, ISSN 0020-1669,
[Article]
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. |
| Title: | Introducing a Large Polar Tetragonal Distortion into Ba-Doped BiFeO3by Low-Temperature Fluorination |
| Language: | English |
| 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. |
| Journal or Publication Title: | Inorganic Chemistry |
| Volume of the journal: | 53 |
| Issue Number: | 23 |
| Publisher: | ACS Publications |
| 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 |
| URL / URN: | http://dx.doi.org/10.1021/ic502183t |
| Identification Number: | doi:10.1021/ic502183t |
| PPN: | |
| Funders: | H.H. appreciates the support of the State of Hesse by an equipment grant. |
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