| Content Provider | MDPI |
|---|---|
| Author | Lorenz, Michael Wagner, Gerald Lazenka, Vera Schwinkendorf, Peter Bonholzer, Michael Van Bael, Margriet Vantomme, André Temst, Kristiaan Oeckler, Oliver Grundmann, Marius |
| Abstract | Epitaxial multiferroic BaTiO3-BiFeO3 composite thin films exhibit a correlation between the magnetoelectric (ME) voltage coefficient αME and the oxygen partial pressure during growth. The ME coefficient αME reaches high values up to 43 V/(cm·Oe) at 300 K and at 0.25 mbar oxygen growth pressure. The temperature dependence of αME of the composite films is opposite that of recently-reported BaTiO3-BiFeO3 superlattices, indicating that strain-mediated ME coupling alone cannot explain its origin. Probably, charge-mediated ME coupling may play a role in the composite films. Furthermore, the chemically-homogeneous composite films show an oxygen vacancy superstructure, which arises from vacancy ordering on the {111} planes of the pseudocubic BaTiO3-type structure. This work contributes to the understanding of magnetoelectric coupling as a complex and sensitive interplay of chemical, structural and geometrical issues of the BaTiO3-BiFeO3 composite system and, thus, paves the way to practical exploitation of magnetoelectric composites. |
| File Size | 9984000 |
| File Format | |
| e-ISSN | 19961944 |
| DOI | 10.3390/ma9010044 |
| Journal | Materials |
| Issue Number | 1 |
| Volume Number | 9 |
| Language | English |
| Publisher Date | 2016-01-13 |
| Access Restriction | Open |
| Subject Keyword | oxide thin films multiferroic composites magnetoelectric coupling magnetoelectric voltage coefficient oxygen vacancy superstructure pulsed laser deposition |
| Content Type | Text |
| Resource Type | Article |
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