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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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 |
|---|---|
| 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: | Date Event 2013 Published |
| 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 |
| URI: | https://wrap.warwick.ac.uk/58383/ |
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