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09:35
Applying Dynamic Strain on Thin Oxide Films Immobilized on a Pseudoelastic Nickel-Titanium Alloy
Published on: July 28, 2020
Elastically driven ferromagnetic resonance in nickel thin films
1Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany.
Physical Review Letters
|April 8, 2011
Summary
Researchers used GHz surface acoustic waves (SAWs) to excite and detect ferromagnetic resonance (FMR) in a novel hybrid device. This elastic method offers a new way to study magnetic properties at room temperature.
Area of Science:
- Physics
- Materials Science
- Acoustics
Background:
- Ferromagnetic resonance (FMR) is a key technique for probing magnetic properties.
- Traditional FMR methods often require microwave frequencies and complex setups.
- Exploring alternative excitation and detection methods for FMR is crucial for advancing magnetic studies.
Purpose of the Study:
- To investigate the use of GHz surface acoustic waves (SAWs) for all-elastic excitation and detection of FMR.
- To explore the potential of a ferromagnetic-ferroelectric (Ni/LiNbO3) hybrid device for SAW-driven FMR.
- To analyze the influence of magnetic field orientation on elastically driven FMR.
Main Methods:
- Fabrication of a Ni/LiNbO3 hybrid device.
- Measurement of SAW magnetotransmission at room temperature.
- Systematic variation of frequency, magnetic field magnitude, and orientation.
- Application of a modified Landau-Lifshitz-Gilbert model incorporating a strain-induced tickle field.
Main Results:
- Successful all-elastic excitation and detection of FMR using GHz SAWs.
- Observation of a distinct magnetic field orientation dependence in elastically driven FMR.
- Experimental data were well-described by the modified Landau-Lifshitz-Gilbert approach.
- Demonstration of the feasibility of the Ni/LiNbO3 hybrid device for this technique.
Conclusions:
- GHz SAWs provide an effective means for all-elastic FMR excitation and detection.
- The developed model accurately captures the strain-induced effects on magnetization dynamics.
- This elastic FMR approach offers a promising alternative for studying magnetic materials.
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