| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Functional Nanomaterials
|
| Presentation Title |
Structural properties and Magnetostriction-Induced Piezoelectric Phenomena in Hybrid Nanowires: In-Situ TEM Analysis |
| Author(s) |
Wiktoria Zajkowska-Pietrzak, Slawomir Kret, Michał Chojnacki, Piotr Dluzewski |
| On-Site Speaker (Planned) |
Slawomir Kret |
| Abstract Scope |
Hybrid core-shell nanowires (H-NWs) with ZnO piezoelectric cores and FeGa magnetostrictive shells show promise as nano-devices controlled by external magnetic and electric fields. Mechanical deformation at the core-shell interface can alter piezoelectric and magnetostrictive properties, enabling the generation of electric fields under magnetic influence and vice versa. These nanowires are thus sensitive to environmental electromagnetic fluctuations. The ZnO cores were synthesized on a- and m-sapphire substrates using a modified carbothermal method, producing vertical (a-sapphire) and tilted (m-sapphire) nanowires, 20-60 µm long and 80-500 nm in diameter. TEM cross-sectional analysis revealed a defect-free structure and a ZnAl2O4 spinel layer between the substrate and nanowires. Polycrystalline textured FeGa shells were deposited using magnetron sputtering. In situ TEM testing using MEMS chips, which allowed 2- or 4-probe electric measurements under a variable magnetic field, showed the piezoelectric and magnetic response detected by electron holography. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nanotechnology, Magnetic Materials, Characterization |