Magnetoelastic excitation of single nanomagnets for optical measurement of intrinsic Gilbert damping
| Autor: | Cassidy Berk, M. Jaris, Wei-Gang Yang, Holger Schmidt, D. L. Hibbard-Lubow |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
Condensed matter physics Direct observation 02 engineering and technology Acoustic wave Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 021001 nanoscience & nanotechnology 01 natural sciences Nanomagnet Condensed Matter::Materials Science Magnetization Coupling (physics) Computer Science::Emerging Technologies 0103 physical sciences Precession 010306 general physics 0210 nano-technology Nanoscopic scale Excitation |
| Zdroj: | Physical Review B. 97 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.97.224410 |
| Popis: | We report an alternative all-optical technique to drive and probe the spin dynamics of single nanomagnets. Optically generated surface acoustic waves (SAWs) drive the magnetization precession in nanomagnets via magnetoelastic (MEL) coupling. We investigate the field-swept dynamics of isolated Ni nanomagnets at various SAW frequencies and show that this method can be used to accurately determine the intrinsic Gilbert damping of nanostructured magnetic materials. This technique opens a new avenue for studying the spin dynamics of nanoscale devices using nonthermal (``cold'') excitation, enabling direct observation of the MEL driven dynamics. |
| Databáze: | OpenAIRE |
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