Controllable magnetic anisotropy of ferromagnet/antiferromagnet bilayers coupled with piezoelectric strain
| Autor: | Jung-Il Hong, Chun-Yeol You, Hyun-Joong Kim, Min-Seung Jung |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Polymers and Plastics Condensed matter physics Metals and Alloys 02 engineering and technology Substrate (electronics) 021001 nanoscience & nanotechnology 01 natural sciences Piezoelectricity Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Coupling (physics) Magnetic anisotropy Ferromagnetism 0103 physical sciences Ceramics and Composites Antiferromagnetism 0210 nano-technology Anisotropy Spin (physics) |
| Zdroj: | Acta Materialia. 171:170-175 |
| ISSN: | 1359-6454 |
| DOI: | 10.1016/j.actamat.2019.04.015 |
| Popis: | Coupling of magnetoelastic and piezoelectric effects is achieved with the ferromagnetic (FM) Co60Fe20B20/antiferromagnetic (AFM) Co0.7Ni0.3O bilayers deposited on the surface of piezoelectric single crystalline substrate. Piezoelectric strain of the substrate is successfully transferred to the magnetic layers, and controllable variation of magnetic anisotropy in response to the elastic deformation is demonstrated in the M-H loops measured at various azimuthal angles with respect to the direction of AFM spin alignment. Magnetic behaviors of the exchange coupled bilayers can be understood by considering the competition of many magnetic anisotropy energies within the magnetic film based on the modified Meiklejohn and Bean (MB) model. From the comparison of experimentally measured results with the modified MB model, it is found that the strain in the film from the substrate effectively introduces additional uniaxial anisotropy in the FM layer with its anisotropy direction and magnitude determined by the applied strain. |
| Databáze: | OpenAIRE |
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