Driving Magnetization Dynamics in an On-Demand Magnonic Crystal via the Magnetoelastic Interactions
- University of Groningen (Netherlands)
- Adam Mickiewicz University in Poznan (Poland)
- Le Mans Université, Le Mans Cedex (France)
- Griefswald Univ. (Germany)
- Adam Mickiewicz University in Poznan (Poland); Griefswald Univ. (Germany)
- University of Groningen (Netherlands); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Using spatial light interference of ultrafast laser pulses, we generate a lateral modulation in the magnetization profile of an otherwise uniformly magnetized film, whose magnetic excitation spectrum is monitored via the coherent and resonant interaction with elastic waves. In this study, we find an unusual dependence of the magnetoelastic coupling as the externally applied magnetic field is angle- and field-tuned relative to the wave vector of the magnetization modulation, which can be explained by the emergence of spatially inhomogeneous spin-wave modes. In this regard, the spatial light interference methodology can be seen as a user-configurable, temporally windowed, on-demand magnonic crystal, potentially of arbitrary two-dimensional shape, which allows control and selectivity of the spatial distribution of spin waves. Finally, calculations of spin waves using a variety of methods, demonstrated here using the plane-wave method and micromagnetic simulation, can identify the spatial distribution and associated energy scales of each excitation, which opens the door to a number of excitation methodologies beyond our chosen elastic wave excitation.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE; Laboratory Directed Research & Development (LDRD)
- Grant/Contract Number:
- 89233218CNA000001
- OSTI ID:
- 1530775
- Report Number(s):
- LA-UR-18-25297; PRAHB2
- Journal Information:
- Physical Review Applied, Vol. 10, Issue 6; ISSN 2331-7019
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Optical Excitation of Propagating Magnetostatic Waves in an Epitaxial Galfenol Film by Ultrafast Magnetic Anisotropy Change
|
journal | October 2019 |
Reversible tuning of omnidirectional band gaps in two-dimensional magnonic crystals by magnetic field and in-plane squeezing
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journal | December 2019 |
| Optical excitation of propagating magnetostatic waves in an epitaxial Galfenol film by an ultrafast magnetic anisotropy change | text | January 2019 |
| Reversible tuning of omnidirectional band gaps in two-dimensional magnonic crystals by magnetic field and in-plane squeezing | text | January 2019 |
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