Clarification of Size Effects in Polycrystalline BaTiO3 Thin Films by Means of the Specific Heat Measurements: Grain Size or Film Thickness?
Specific heat of polycrystalline BaTiO 3 thin films on the fused quartz substrate was measured by ac-hot probe method. Phase transition temperature and excess entropy were determined as a function of film thicknesses and grain sizes. The variation of the latter was obtained in the limits 30-150 nm b...
Saved in:
Published in: | Ferroelectrics 2004-01, Vol.301 (1), p.157-162 |
---|---|
Main Authors: | , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Online Access: | Get full text |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Summary: | Specific heat of polycrystalline BaTiO
3
thin films on the fused quartz substrate was measured by ac-hot probe method. Phase transition temperature and excess entropy were determined as a function of film thicknesses and grain sizes. The variation of the latter was obtained in the limits 30-150 nm by changing of the temperature of the substrate during sputtering while thickness of films 20-1100 nm was controlled by the time of sputtering. It was found that the relation between the thickness and grain size is important for the size effects in polycrystalline films. |
---|---|
ISSN: | 0015-0193 1563-5112 |
DOI: | 10.1080/00150190490455674 |