Magnetite Fe3O4: the Correlated Electron-Phonon System |
| A. Kozłowski, Z. Kąkol and Z. Tarnawski
Department of Solid State Physics, Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland |
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| Received: 14 09 2006; |
| In the paper the influence of magnetic as well as electron-lattice interactions on the Verwey transition in magnetite related compounds is discussed based on the authors' experimental activity and available literature. While magnetism was proved to only reflect the transition, the results of nuclear inelastic scattering show that lattice dynamics actively participates in it. The studies of diffuse neutron scattering and heat capacity suggest also that the low temperature lattice properties of slightly doped magnetite are distinct from those with higher dopant concentration. Finally, recent theoretical results strongly suggest that the Verwey transition in magnetite cannot be understood and described without strong involvement of electron-lattice interactions. |
| DOI: 10.12693/APhysPolA.111.537 PACS numbers: 64.70.Kb, 75.40.-s, 63.20.Kr, 71.30.+h, 75.30.Cr |