Are magnetite (Fe3O4) films on MgAl2O4 auxetic?
| Autor: | Ziese, M. |
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| Rok vydání: | 2011 |
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| Druh dokumentu: | Working Paper |
| Popis: | Magnetite (Fe3O4) films were fabricated on MgAl2O4 (001) single crystal substrates by pulsed laser deposition. In-plane and out-of-plane lattice constants were determined by X-ray diffraction. The apparent Poisson's ratio was determined as the negative ratio of the out-of-plane to in-plane strains. The results show that (i) the determination of Poisson's ratio by this method is only reliable for fully strained films and (ii) Poisson's ratio = 0.3 along the <100> direction is positive for this archetypal ferrite. Fe3O4 films grown on MgAl2O4 (001) are not auxetic. Comment: 4 pages, 2 figures |
| Databáze: | arXiv |
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