TY - JOUR
T1 - Lattice dynamics of PbTiO3
AU - Tomeno, Izumi
AU - Fernandez-Baca, Jaime A.
AU - Marty, Karol J.
AU - Tsunoda, Yorihiko
AU - Oka, Kunihiko
PY - 2012
Y1 - 2012
N2 - Inelastic neutron scattering experiments were performed to investigate the phonon dispersion relations along the [1,0,0], [1,1,0] and [1,1,1] directions in cubic PbTiO3. All of the transverse optic (TO) branches soften significantly toward the zone center around Tc. The zone-center TO mode stiffens considerably at 1173 K. The energies of the [ξ, 0, 0] TO branch for PbTiO3 measured at 793 K are considerably higher than those for Pb(Zn1/3Nb2/3)O3 at 423 K in the entire zone. The [ξ, 0, 0] transverse acoustic (TA) branch is found to soften slightly at 793 K. The [ξ, ξ, ξ] TA branch exhibits two minima at the middle point (1/4,1/4,1/4) and the zone boundary (1/2,1/2,1/2). These two modes are weakly temperature dependent up to 1173 K.
AB - Inelastic neutron scattering experiments were performed to investigate the phonon dispersion relations along the [1,0,0], [1,1,0] and [1,1,1] directions in cubic PbTiO3. All of the transverse optic (TO) branches soften significantly toward the zone center around Tc. The zone-center TO mode stiffens considerably at 1173 K. The energies of the [ξ, 0, 0] TO branch for PbTiO3 measured at 793 K are considerably higher than those for Pb(Zn1/3Nb2/3)O3 at 423 K in the entire zone. The [ξ, 0, 0] transverse acoustic (TA) branch is found to soften slightly at 793 K. The [ξ, ξ, ξ] TA branch exhibits two minima at the middle point (1/4,1/4,1/4) and the zone boundary (1/2,1/2,1/2). These two modes are weakly temperature dependent up to 1173 K.
UR - http://www.scopus.com/inward/record.url?scp=84858599683&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/340/1/012054
DO - 10.1088/1742-6596/340/1/012054
M3 - Conference article
AN - SCOPUS:84858599683
SN - 1742-6588
VL - 340
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
M1 - 012054
T2 - 5th European Conference on Neutron Scattering, ECNS 2011
Y2 - 17 July 2011 through 21 July 2011
ER -