Back to Search
Start Over
Magnetic domain walls as broadband spin wave and elastic magnetisation wave emitters
- Source :
- Scientific Reports, Vol 8, Iss 1, Pp 1-11 (2018)
- Publication Year :
- 2018
- Publisher :
- Nature Publishing Group, 2018.
-
Abstract
- We report on the direct observation of spin wave and elastic wave emission from magnetic domain walls in ferromagnetic thin films. Driven by alternating homogeneous magnetic fields the magnetic domain walls act as coherent magnetisation wave sources. Directional and low damped elastic waves below and above the ferromagnetic resonance are excited. The wave vector of the magnetoelastically induced acoustic waves is tuned by varying the excitation frequency. The occurrence of elastic wave emission is proved by a combination of micromagnetic and mechanical finite element simulations. Domain wall emitted magnetostatic surface spin waves occur at higher frequencies, which characteristics are confirmed by micromagnetic simulations. The distinct modes of magnetisation wave excitation from micromagnetic objects are a general physical phenomenon relevant for dynamic magnetisation processes in structured magnetic films. Magnetic domain walls can act as reconfigurable antennas for spin wave and elastic wave generation. The wave orientation can be controlled separately via the domain wall orientation for elastic waves and via magnetization orientation for magnetostatic surface spin waves.
- Subjects :
- Physics
Multidisciplinary
Condensed matter physics
Magnetic domain
lcsh:R
lcsh:Medicine
02 engineering and technology
Acoustic wave
021001 nanoscience & nanotechnology
01 natural sciences
Ferromagnetic resonance
Magnetic field
Magnetization
Condensed Matter::Materials Science
Domain wall (magnetism)
Spin wave
0103 physical sciences
Condensed Matter::Strongly Correlated Electrons
lcsh:Q
010306 general physics
0210 nano-technology
lcsh:Science
Excitation
Subjects
Details
- Language :
- English
- ISSN :
- 20452322
- Volume :
- 8
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- Scientific Reports
- Accession number :
- edsair.doi.dedup.....732a045f18774982560089f1469751ff