Shabadi, V. ; Major, M. ; Komissinskiy, P. ; Vafaee, M. ; Radetinac, A. ; Baghaie Yazdi, M. ; Donner, W. ; Alff, L. (2014)
Origin of superstructures in (double) perovskite thin films.
In: Journal of Applied Physics, 116 (11)
doi: 10.1063/1.4895636
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
We have investigated the origin of superstructure peaks as observed by X-ray diffraction of multiferroic Bi(Fe0.5Cr0.5)O3 thin films grown by pulsed laser deposition on single crystal SrTiO3 substrates. The photon energy dependence of the contrast between the atomic scattering factors of Fe and Cr is used to rule out a chemically ordered double perovskite Bi2FeCrO6 (BFCO). Structural calculations suggest that the experimentally observed superstructure occurs due to unequal cation displacements along the pseudo-cubic [111] direction that mimic the unit cell of the chemically ordered compound. This result helps to clarify discrepancies in the correlations of structural and magnetic order reported for Bi2FeCrO6. The observation of a superstructure in itself is not a sufficient proof of chemical order in double perovskites.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2014 |
| Autor(en): | Shabadi, V. ; Major, M. ; Komissinskiy, P. ; Vafaee, M. ; Radetinac, A. ; Baghaie Yazdi, M. ; Donner, W. ; Alff, L. |
| Art des Eintrags: | Bibliographie |
| Titel: | Origin of superstructures in (double) perovskite thin films |
| Sprache: | Englisch |
| Publikationsjahr: | 2014 |
| Verlag: | AIP Publishing LLC |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Applied Physics |
| Jahrgang/Volume einer Zeitschrift: | 116 |
| (Heft-)Nummer: | 11 |
| DOI: | 10.1063/1.4895636 |
| Kurzbeschreibung (Abstract): | We have investigated the origin of superstructure peaks as observed by X-ray diffraction of multiferroic Bi(Fe0.5Cr0.5)O3 thin films grown by pulsed laser deposition on single crystal SrTiO3 substrates. The photon energy dependence of the contrast between the atomic scattering factors of Fe and Cr is used to rule out a chemically ordered double perovskite Bi2FeCrO6 (BFCO). Structural calculations suggest that the experimentally observed superstructure occurs due to unequal cation displacements along the pseudo-cubic [111] direction that mimic the unit cell of the chemically ordered compound. This result helps to clarify discrepancies in the correlations of structural and magnetic order reported for Bi2FeCrO6. The observation of a superstructure in itself is not a sufficient proof of chemical order in double perovskites. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Dünne Schichten 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Strukturforschung 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 17 Nov 2014 13:27 |
| Letzte Änderung: | 17 Nov 2014 13:27 |
| PPN: | |
| Sponsoren: | V.S. acknowledges a fellowship from the German Academic Exchange Service (DAAD). |
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