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Coherent magnon and acoustic phonon dynamics in tetragonal and rare-earth-doped BiFeO_{3} multiferroic thin films
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Doig, K. I., Aguesse, F., Axelsson, A. K., Alford, N. M., Nawaz, S., Palkar, V. R., Jones, S. P. P., Johnson, R. D., Synowicki, R. A. and Lloyd-Hughes, James (2013) Coherent magnon and acoustic phonon dynamics in tetragonal and rare-earth-doped BiFeO_{3} multiferroic thin films. Physical Review B (Condensed Matter and Materials Physics), Volume 88 (Number 9). Article number 094425 . doi:10.1103/PhysRevB.88.094425 ISSN 1098-0121.
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Official URL: http://dx.doi.org/10.1103/PhysRevB.88.094425
Abstract
Coherent magnons and acoustic phonons were impulsively excited and probed in thin films of the room temperature multiferroic Bi1−x−yDyxLayFeO3 using femtosecond laser pulses. The elastic moduli of rhombohedral, tetragonal, and rare-earth doped BiFeO3 were determined from acoustic-mode frequencies in conjunction with spectroscopic ellipsometry. A weak ferromagnetic order, induced alternately by magnetization in the growth direction or by tetragonality, created a magnon oscillation at 75 GHz, indicative of a Dzyaloshinskii-Moriya interaction energy of 0.31 meV.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Physical Review B (Condensed Matter and Materials Physics) | ||||
Publisher: | American Physical Society | ||||
ISSN: | 1098-0121 | ||||
Official Date: | 2013 | ||||
Dates: |
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Volume: | Volume 88 | ||||
Number: | Number 9 | ||||
Page Range: | Article number 094425 | ||||
DOI: | 10.1103/PhysRevB.88.094425 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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