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Terahertz spectroscopy of central and soft phonon modes in LuFe2O4.
- Source :
-
Applied Physics A: Materials Science & Processing . Sep2009, Vol. 96 Issue 4, p893-898. 6p. 1 Diagram, 4 Graphs. - Publication Year :
- 2009
-
Abstract
- The terahertz dielectric response of LuFe2O4 is investigated by terahertz time-domain spectroscopy over a temperature range of 6–290 K. It is revealed that besides the central mode associated with the charge-ordered state, a soft TO1 mode at below ∼240 K is identified indicating the existence of displacing ferroelectricity, in addition to the charge-ordering-induced ferroelectricity at below 320 K. The anomaly of the soft mode at ∼180 K reflects the magnetoelectric correlation between the soft TO1 mode and the spin/charge fluctuations revealed recently. Finally, the magnetic property at below ∼240 K is discussed. [ABSTRACT FROM AUTHOR]
- Subjects :
- *TERAHERTZ spectroscopy
*PHONONS
*FERROELECTRICITY
*DIELECTRICS
*SPECTRUM analysis
Subjects
Details
- Language :
- English
- ISSN :
- 09478396
- Volume :
- 96
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Applied Physics A: Materials Science & Processing
- Publication Type :
- Academic Journal
- Accession number :
- 43351999
- Full Text :
- https://doi.org/10.1007/s00339-009-5315-y