Thickness dependence of the magnetoelectric coupling in Fe89Ga11 thin films deposited on ferroelectric PMN-PT single crystals
| Autor: | Alejandro Butera, Julian Milano, D. Velázquez Rodriguez, L. Leiva, J.E. Gómez, M.J. Jiménez, Gabriela Fernanda Cabeza |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Condensed matter physics Magnetoelectric effect Magnetostriction 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Ferromagnetic resonance Ferroelectricity Electronic Optical and Magnetic Materials Hysteresis Magnetization Magnetic anisotropy Electric field 0103 physical sciences 0210 nano-technology |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 501:166361 |
| ISSN: | 0304-8853 |
| Popis: | We have investigated the effects of applying an electric field on the dc and ac magnetic response of Fe 89 Ga 11 thin films ( t = 6 , 11, 17, 22, and 28 nm) that have been deposited on ferroelectric PMN-PT (011) and (001) single crystals. Upon the application of an electric field we have observed that M vs. H hysteresis loops are modified in films grown on (011) crystals, consistent with a positive magnetostriction constant that depends on film thickness. From ferromagnetic resonance experiments at 9.5 GHz we obtained a thickness dependent magnetoelectric coefficient in the case of (011) substrates, showing a maximum dH / dE ∼ 150 Oe.m/MV for t = 28 nm, coincident with the estimations made from M vs. H loops. It was found that the direction of easy magnetization could be rotated by 90 ° upon the application of an electric field only in the case of 28 nm films deposited on PMN-PT (011). In thinner films the magnetoelectric coefficient is too small to overcome the magnetic anisotropy. These results indicate that if magnetostrictive materials are to be applied in straintronic devices the dependence of magnetic parameters with film thickness must be taken in account for optimum performance. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect