TY - JOUR
T1 - Raman spectroscopy of (formula presented) near the paramagnetic-to-ferromagnetic phase transition
AU - Iliev, M. N.
AU - Litvinchuk, A. P.
AU - Lee, H. G.
AU - Chen, C. L.
AU - Dezaneti, M. L.
AU - Chu, C. W.
AU - Ivanov, V. G.
AU - Abrashev, M. V.
AU - Popov, V. N.
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 1999
Y1 - 1999
N2 - The polarized Raman spectra of (010)- and (001)-oriented epitaxial thin films of (Formula presented) (space group (Formula presented) (Formula presented)) are measured between 5 and 300 K. The Raman lines at 123, 225, 252, 291, 361, 390–393, and (Formula presented) are assigned to definite modes of (Formula presented) or (Formula presented) symmetry based of their polarization selection rules, the comparison with the results of lattice dynamical calculations (LDC), and accounting for the correlation between the Γ-point phonons in the (Formula presented) structure and the Γ-, (Formula presented)-, (Formula presented)-, and (Formula presented)-point phonon modes in the parent (Formula presented) structure. The pronounced anomalies of the Raman phonon parameters near the ferromagnetic transition (Formula presented) are discussed in terms of enhanced spin-phonon coupling and reorganization of the electronic states in the vicinity of (Formula presented).
AB - The polarized Raman spectra of (010)- and (001)-oriented epitaxial thin films of (Formula presented) (space group (Formula presented) (Formula presented)) are measured between 5 and 300 K. The Raman lines at 123, 225, 252, 291, 361, 390–393, and (Formula presented) are assigned to definite modes of (Formula presented) or (Formula presented) symmetry based of their polarization selection rules, the comparison with the results of lattice dynamical calculations (LDC), and accounting for the correlation between the Γ-point phonons in the (Formula presented) structure and the Γ-, (Formula presented)-, (Formula presented)-, and (Formula presented)-point phonon modes in the parent (Formula presented) structure. The pronounced anomalies of the Raman phonon parameters near the ferromagnetic transition (Formula presented) are discussed in terms of enhanced spin-phonon coupling and reorganization of the electronic states in the vicinity of (Formula presented).
UR - http://www.scopus.com/inward/record.url?scp=0000049052&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0000049052&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.59.364
DO - 10.1103/PhysRevB.59.364
M3 - Article
AN - SCOPUS:0000049052
VL - 59
SP - 364
EP - 368
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 1
ER -