Spin-wave interference in microscopic permalloy tubes

Journal Article · Mon Jun 03 00:00:00 EDT 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4801472· OSTI ID:22162964

Balhorn, Felix; Nagrodzki, Lukas; Mendach, Stefan ^[1]

---

1. Institut fuer Angewandte Physik und Zentrum fuer Mikrostrukturforschung, Universitaet Hamburg, Jungiusstrasse 11, D-20355 Hamburg (Germany)

We present permalloy coated needles which act as spin-wave resonators. The permalloy coated needles were investigated using microwave absorption spectroscopy. Thereby, we found up to three resonant modes which correspond to constructively interfering azimuthal spin waves. The resonant modes are well reproduced in calculations based on an analytical model for the spin-wave dispersion employing periodic boundary conditions. The dependence of the resonance frequencies on the needles' radii and the external magnetic field is demonstrated experimentally.

• OSTI ID: 22162964
• Journal Information: Applied Physics Letters, Vol. 102, Issue 22; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTROSCOPY
BOUNDARY CONDITIONS
DISPERSIONS
INTERFERENCE
MAGNETIC FIELDS
MICROWAVE RADIATION
MICROWAVE SPECTRA
PERIODICITY
PERMALLOY
RESONATORS
SPIN WAVES