Baghaie Yazdi, M. ; Choi, K.-Y. ; Wulferding, D. ; Lemmens, P. ; Alff, L. (2013)
Raman study of the Verwey transition in magnetite thin films.
In: New Journal of Physics, 15 (10)
Article
Abstract
We have grown epitaxial thin films of magnetite on MgO and Al2O3 substrates with sharp and distinct signatures of the Verwey transition in resistivity and magnetization. We have used Raman scattering to separate the footprint of purely structural changes from the effect of additional charge and orbital order. Raman modes related to the structural phase transition occur first at temperatures above the Verwey transition temperature. In contrast, newly emerging modes indicating additional charge and orbital order appear at the Verwey transition. These results suggest that the completion of the structural phase transition in magnetite is a necessary precursor triggering a transition into a complex charge and orbitally ordered state.
| Item Type: | Article |
|---|---|
| Erschienen: | 2013 |
| Creators: | Baghaie Yazdi, M. ; Choi, K.-Y. ; Wulferding, D. ; Lemmens, P. ; Alff, L. |
| Type of entry: | Bibliographie |
| Title: | Raman study of the Verwey transition in magnetite thin films |
| Language: | English |
| Date: | 2013 |
| Publisher: | IOP Publishing Deutsche Physikalische Gesellschaft |
| Journal or Publication Title: | New Journal of Physics |
| Volume of the journal: | 15 |
| Issue Number: | 10 |
| URL / URN: | http://dx.doi.org/10.1088/1367-2630/15/10/103032 |
| Abstract: | We have grown epitaxial thin films of magnetite on MgO and Al2O3 substrates with sharp and distinct signatures of the Verwey transition in resistivity and magnetization. We have used Raman scattering to separate the footprint of purely structural changes from the effect of additional charge and orbital order. Raman modes related to the structural phase transition occur first at temperatures above the Verwey transition temperature. In contrast, newly emerging modes indicating additional charge and orbital order appear at the Verwey transition. These results suggest that the completion of the structural phase transition in magnetite is a necessary precursor triggering a transition into a complex charge and orbitally ordered state. |
| Identification Number: | doi:10.1088/1367-2630/15/10/103032 |
| Divisions: | 11 Department of Materials and Earth Sciences > Material Science > Advanced Thin Film Technology 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences |
| Date Deposited: | 09 Jan 2014 09:36 |
| Last Modified: | 26 Jul 2016 14:25 |
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