Spin waves in micro-structured yttrium iron garnet nanometer-thick films
Abstract
We investigated the spin-wave propagation in a micro-structured yttrium iron garnet waveguide of 40 nm thickness. Utilizing spatially-resolved Brillouin light scattering microscopy, an exponential decay of the spin-wave amplitude of (10.06 ± 0.83) μm was observed. This leads to an estimated Gilbert damping constant of α=(8.79±0.73)×10−4, which is larger than damping values obtained through ferromagnetic resonance measurements in unstructured films. The theoretically calculated spatial interference of waveguide modes was compared to the spin-wave pattern observed experimentally by means of Brillouin light scattering spectroscopy.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 24, 2015
- Source ID
- 10.1063/1.4916027
Entities
People
- Anand Bhattacharya
- Axel Hoffmann
- Houchen Chang
- J. B. Ketterson
- John E. Pearson
- Joseph Sklenar
- Matthias B. Jungfleisch
- Mingzhong Wu
- Stephen M. Wu
- Wanjun Jiang
- Wei Zhang
Organizations
- Argonne National Laboratory
- Army Research Office
- Colorado State University
- National Science Foundation
- Northwestern University