Low Temperature Physics: 28, 523 (2002); https://doi.org/10.1063/1.1496661 (5 pages)
Физика Низких Температур: Том 28, Выпуск 7 (Июль 2002), c. 733-738 ( к оглавлению , назад )
Nonlinear optical spectroscopy of epitaxial magnetic garnet films
V. V. Pavlov and R. V. Pisarev
A. F. Ioffe Physical Technical Institute of the Russian Academy of Sciences, St. Petersburg, 194021 Russia
M. Fiebig and D. Fröhlich
Institut für Physik, Universität Dortmund, 44221 Dortmund, Germany
Received February 1, 2002
Second and third harmonic optical spectra are studied in epitaxial magnetic thin films in the spectral ranges 1.7-3.2 eV and 2.4-4.2 eV, respectively. No significant increase of the intensity of the nonlinear spectra is found above the bandgap near 3.2 eV, where the linear absorption increases by two orders of magnitude. Large magnetic contributions to the second harmonic spectra and magnetic contrast as high as 100% are observed at selected photon energies.
Contrary to that, no magnetic contribution to the third harmonic spectra is found.