High resolution spatial mapping of the electrocaloric effect in a multilayer ceramic capacitor using scanning thermal microscopy

High resolution spatial mapping of the electrocaloric effect in a multilayer ceramic capacitor using scanning thermal microscopy

Scanning thermal microscopy (SThM) is emerging as a powerful atomic force microscope based platform for mapping dynamic temperature distributions on the nanoscale. To date, however, spatial imaging of temperature changes in electrocaloric (EC) materials using this technique has been very limited. We...

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Bibliographic Details
Published in:JPhys Energy Vol. 5; no. 4; pp. 45009 - 45015
Main Authors: Baxter, Olivia E, Kumar, Amit, Gregg, J Marty, McQuaid, Raymond G P
Format: Journal Article
Language:English
Published: Bristol IOP Publishing 01-10-2023
Subjects:
Capacitors
electrocalorics
ferroelectrics
Infrared imaging
Mapping
Microscopy
multilayer ceramic capacitors
Multilayers
Scanning thermal microscopy
Thermal imaging
Online Access:Get full text
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Summary:Scanning thermal microscopy (SThM) is emerging as a powerful atomic force microscope based platform for mapping dynamic temperature distributions on the nanoscale. To date, however, spatial imaging of temperature changes in electrocaloric (EC) materials using this technique has been very limited. We build on the prior works of Kar-Narayan et al (2013 Appl. Phys. Lett. 102 032903) and Shan et al (2020 Nano Energy 67 104203) to show that SThM can be used to spatially map EC temperature changes on microscopic length scales, here demonstrated in a commercially obtained multilayer ceramic capacitor. In our approach, the EC response is measured at discrete locations with point-to-point separation as small as 125 nm, allowing for reconstruction of spatial maps of heating and cooling, as well as their temporal evolution. This technique offers a means to investigate EC responses at sub-micron length scales, which cannot easily be accessed by the more commonly used infrared thermal imaging approaches.
Bibliography:JPENERGY-100740.R1
ISSN:2515-7655
2515-7655
DOI:10.1088/2515-7655/acf7f1