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Title: 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{sup −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.

Authors:
; ; ; ; ; ;  [1]; ;  [2]; ;  [3]
  1. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
  2. Department of Physics, Colorado State University, Fort Collins, Colorado 80523 (United States)
  3. Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208 (United States)
Publication Date:
OSTI Identifier:
22410062
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION SPECTROSCOPY; BRILLOUIN EFFECT; COMPARATIVE EVALUATIONS; DAMPING; FERRITE GARNETS; FERROMAGNETIC RESONANCE; FILMS; INTERFERENCE; LIGHT SCATTERING; MICROSCOPY; SPIN WAVES; WAVE PROPAGATION; WAVEGUIDES; YTTRIUM COMPOUNDS

Citation Formats

Jungfleisch, Matthias B., E-mail: jungfleisch@anl.gov, Zhang, Wei, Jiang, Wanjun, Wu, Stephen M., Pearson, John E., Bhattacharya, Anand, Hoffmann, Axel, Chang, Houchen, Wu, Mingzhong, Sklenar, Joseph, and Ketterson, John B. Spin waves in micro-structured yttrium iron garnet nanometer-thick films. United States: N. p., 2015. Web. doi:10.1063/1.4916027.
Jungfleisch, Matthias B., E-mail: jungfleisch@anl.gov, Zhang, Wei, Jiang, Wanjun, Wu, Stephen M., Pearson, John E., Bhattacharya, Anand, Hoffmann, Axel, Chang, Houchen, Wu, Mingzhong, Sklenar, Joseph, & Ketterson, John B. Spin waves in micro-structured yttrium iron garnet nanometer-thick films. United States. doi:10.1063/1.4916027.
Jungfleisch, Matthias B., E-mail: jungfleisch@anl.gov, Zhang, Wei, Jiang, Wanjun, Wu, Stephen M., Pearson, John E., Bhattacharya, Anand, Hoffmann, Axel, Chang, Houchen, Wu, Mingzhong, Sklenar, Joseph, and Ketterson, John B. Thu . "Spin waves in micro-structured yttrium iron garnet nanometer-thick films". United States. doi:10.1063/1.4916027.
@article{osti_22410062,
title = {Spin waves in micro-structured yttrium iron garnet nanometer-thick films},
author = {Jungfleisch, Matthias B., E-mail: jungfleisch@anl.gov and Zhang, Wei and Jiang, Wanjun and Wu, Stephen M. and Pearson, John E. and Bhattacharya, Anand and Hoffmann, Axel and Chang, Houchen and Wu, Mingzhong and Sklenar, Joseph and Ketterson, John B.},
abstractNote = {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{sup −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.},
doi = {10.1063/1.4916027},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 17,
volume = 117,
place = {United States},
year = {2015},
month = {5}
}