Premium
Raman spectroscopy of highly aligned thin films of Sr 2 FeMoO 6
Author(s) -
Zhang T.,
Branford W. R.,
Trodahl H. J.,
Sharma A.,
Rager J.,
MacManusDriscoll J. L.,
Cohen L. F.
Publication year - 2004
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1258
Subject(s) - raman spectroscopy , thin film , phonon , crystallite , polarization (electrochemistry) , analytical chemistry (journal) , materials science , chemistry , condensed matter physics , nanotechnology , crystallography , optics , physics , organic chemistry
We report a comparative study of polarization‐resolved Raman spectra of highly aligned thin films of Sr 1.9 A 0.1 FeMoO 6 (A = Sr, Ca, Ba) and undoped bulk polycrystalline Sr 2 FeMoO 6 at room temperature. The films were fabricated by a non‐vacuum chemical deposition technique on LaAlO 3 substrates. A site group analysis was performed to establish that there are five A g and seven B g modes, most of which have been identified, and six E g modes, although the latter are not accessible in the c ‐axis aligned films. One B g mode shows clear evidence of an asymmetric lineshape, which is discussed in terms of an interaction between phonons and electronic excitations. Copyright © 2004 John Wiley & Sons, Ltd.