Journal of magnetism and magnetic materials, 2009-06, Vol.321 (11), p.1699-1701
2009
Volltextzugriff (PDF)
Details
- Autor(en) / Beteiligte
- Titel
- Piezoelectric measurements on BiFeO3 single crystal by Raman scattering
- Ist Teil von
- Journal of magnetism and magnetic materials, 2009-06, Vol.321 (11), p.1699-1701
- Ort / Verlag
- Amsterdam: Elsevier
- Erscheinungsjahr
- 2009
- Quelle
- Elsevier ScienceDirect Journals
- Beschreibungen/Notizen
- The piezoelectric response of BiFeO3 at low temperature has been investigated by Raman scattering measurements. The application of an external electric field at T=10 K induces frequency shifts of the lowest frequency mode related to the Bi-O bonds and corresponding to the soft mode of the ferroelectric transition. The piezoelectric effect is responsible for the softening of this mode via the tensile stress leading to the expansion of the crystal. The phonon deformation potential associated with the soft mode has been estimated around -200 cm-1/strain units using the linear piezoelectric coefficient d33=16 pm/V. It found in the range of the ones obtained for typical piezoelectrics.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 0304-8853DOI: 10.1016/j.jmmm.2009.02.020Titel-ID: cdi_proquest_miscellaneous_34329134
- Format
- –
- Schlagworte
- Condensed matter: electronic structure, electrical, magnetic, and optical properties, Condensed matter: structure, mechanical and thermal properties, Dielectrics, piezoelectrics, and ferroelectrics and their properties, Exact sciences and technology, Ferroelectricity and antiferroelectricity, Lattice dynamics, Phase transitions and curie point, Phonon states and bands, normal modes, and phonon dispersion, Phonons and vibrations in crystal lattices, Physics, Piezoelectricity and electromechanical effects