Abstract
We report measurements of the neutron diffuse scattering in a single crystal of the relaxor ferroelectric material 95.5%Pb(Zn 1/3Nb 2/3)O 3-4.5%PbTiO 3 (PZN-4.5%PT). We show that the diffuse scattering at high temperatures has a quasielastic component with energy width 0.1 meV. On cooling the total diffuse scattering intensity increases, but the intensity and the energy width of the quasielastic component gradually diminish. At 50 K the diffuse scattering is completely static (i.e., the energy width lies within the limits of our instrumental resolution). This suggests that the dynamics of the short-range correlated atomic displacements associated with the diffuse scattering freeze at low temperature. We find that this depends on the wave vector q as the quasielastic diffuse scattering intensities associated with 001 (T1-type) and 110 (T2-type) atomic displacements vary differently with temperature and electric field.
Original language | English |
---|---|
Article number | 144106 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 86 |
Issue number | 14 |
DOIs | |
State | Published - Oct 5 2012 |