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Title: Direct electrocaloric measurement of 0.9Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}-0.1PbTiO{sub 3} films using scanning thermal microscopy

We show that scanning thermal microscopy can measure reversible electrocaloric (EC) effects in <40 μm-thick ceramic films of the relaxor ferroelectric 0.9Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}-0.1PbTiO{sub 3}, with the substrate present. We recorded roughly the same non-adiabatic temperature change (±0.23 K) for a thinner film that was driven harder than a thicker film (±31 V μm{sup −1} across 13 μm versus ±11 V μm{sup −1} across 38 μm), because the thicker film lay relatively closer to the substantially larger adiabatic values that we predicted by thermodynamic analysis of electrical data. Film preparation was compatible with the fabrication of EC multilayer capacitors, and therefore our measurement method may be exploited for rapid characterisation of candidate films for cooling applications.
Authors:
; ; ; ;  [1] ; ; ;  [2]
  1. Materials Science, University of Cambridge, Cambridge CB3 0FS (United Kingdom)
  2. Murata Manufacturing Co. Ltd., Higashikotari 1, Nagaokakyo, Kyoto 617–8555 (Japan)
Publication Date:
OSTI Identifier:
22489322
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 108; Journal Issue: 3; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CAPACITORS; CERAMICS; COOLING; FABRICATION; FERROELECTRIC MATERIALS; FILMS; LAYERS; MICROSCOPY; OZONE; SUBSTRATES