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{Direct observation of coherent magnons with suboptical wavelengths in a single-crystalline ferrimagnetic insulator}

2019

Article

mms


Spin-wave dynamics were studied in an extended thin film of single-crystalline yttrium iron garnet using time-resolved scanning transmission x-ray microscopy. A combination of mechanical grinding and focused ion beam milling has been utilized to achieve a soft x-ray transparent thickness of the underlying bulk gadolinium gallium garnet substrate. Damon-Eshbach type spin waves down to about 100 nm wavelength have been directly imaged in real space for varying frequencies and external magnetic fields. The dispersion relation extracted from the experimental data agreed well with theoretical predictions. A significant influence of the ion milling process on the local magnetic properties was not detected.

Author(s): Förster, J. and Gräfe, J. and Bailey, J. and Finizio, S. and Träger, N. and Groß, F. and Mayr, S. and Stoll, H. and Dubs, C. and Surzhenko, O. and Liebing, N. and Woltersdorf, G. and Raabe, J. and Weigand, M. and Schütz, G. and Wintz, S.
Journal: {Physical Review B}
Volume: 100
Number (issue): 21
Year: 2019
Publisher: American Physical Society

Department(s): Modern Magnetic Systems
Bibtex Type: Article (article)

Address: Woodbury, NY
DOI: 10.1103/PhysRevB.100.214416
Language: eng

BibTex

@article{escidoc:3184088,
  title = {{Direct observation of coherent magnons with suboptical wavelengths in a single-crystalline ferrimagnetic insulator}},
  author = {F\"orster, J. and Gr\"afe, J. and Bailey, J. and Finizio, S. and Tr\"ager, N. and Gro\ss, F. and Mayr, S. and Stoll, H. and Dubs, C. and Surzhenko, O. and Liebing, N. and Woltersdorf, G. and Raabe, J. and Weigand, M. and Sch\"utz, G. and Wintz, S.},
  journal = {{Physical Review B}},
  volume = {100},
  number = {21},
  publisher = {American Physical Society},
  address = {Woodbury, NY},
  year = {2019}
}