Abstract
The dielectric properties of Au/[93%Pb(Mg1/3Nb2/3)O-3-7%PbTiO3] (PMN-PT)/(La0.5Sr0.5)CoO3/MgO thin-film capacitor heterostructures, made using pulsed laser deposition, have been investigated, with particular emphasis on the changes in response associated with increasing the magnitude of the ac measuring field. It was found that increasing the ac field caused a change in the frequency spectrum of relaxators, increasing the speed of response of "slow" relaxators, with an associated decrease in the freezing temperature (T-f) of the relaxor system; in addition, other characteristic parameters relating to polar relaxation (activation energy E-a and attempt frequency 1/tau(0)), described by fitting of the dielectric response to a Vogel-Fulcher expression, were found to change continuously as ac field levels were increased.
| Original language | English |
|---|---|
| Article number | 064110 |
| Pages (from-to) | 064110-064110 |
| Number of pages | 1 |
| Journal | Physical Review B (Condensed Matter) |
| Volume | 73 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Feb 2006 |
ASJC Scopus subject areas
- Condensed Matter Physics