A comprehensive study on growth of ferrimagnetic manganese zinc ferrite (Mn0.5Zn0.5Fe2O4) films
on single crystalline strontium titanate(001) (SrTiO3) substrates was carried out. Under the
optimized conditions, a thin film with a layer thickness of 200 nm was deposited, and the structural
properties were investigated. Contrary to data published in literature, no buffer layer was necessary
to achieve epitaxial growth of a poorly lattice-matched layer. This was confirmed for
Mn0.5Zn0.5Fe2O4(001) on SrTiO3(001) by x-ray diffraction and the adjoined phi scans, which also
revealed a lattice compression of 1.2% of the manganese zinc ferrite film in the out-of-plane direction.
Using x-ray photoelectron spectroscopy, the near surface stoichiometry of the film could be
shown to agree with the intended one within the uncertainty of the method. X-ray absorption spectroscopy
showed an electronic structure close to that published for bulk samples. Additional x-ray
magnetic circular dichroism investigations were performed to answer detailed structural questions
by a comparison of experimental data with the calculated ones. The calculations took into account
ion sites (tetrahedral vs. octahedral coordination) as well as the charge of Fe ions (Fe2+ vs. Fe3+).
Contrary to the expectation for a perfect normal spinel that only Fe3þ ions are present in octahedral
sites, hints regarding the presence of additional Fe2+ in octahedral sites as well as Fe3+ ions in tetrahedral
sites have been obtained. Altogether, the layer could be shown to be mostly in a normal
spinel configuration.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:23551 |
| Date | 06 August 2018 |
| Creators | Welke, Martin, Brachwitz, Kerstin, Lorenz, Michael, Grundmann, Marius, Schindler, Karl-Michael, Chassé, Angelika, Denecke, Reinhard |
| Publisher | American Institute of Physics, Universität Leipzig, Martin-Luther-Universität Halle-Wittenberg |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, doc-type:article, info:eu-repo/semantics/article, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | 0021-8979, 1089-7550, 225305 |
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