READ ME File For 'High Resolution Spatial Mapping of the Electrocaloric Effect in a Multilayer Ceramic Capacitor using Scanning Thermal Microscopy'

Dataset DOI: 10.17034/XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX

Date that the readme file was created: Year, Month, Date (2023-08-17)

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GENERAL INFORMATION
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ReadMe Author: Raymond McQuaid, Queen's University Belfast [https://orcid.org/0000-0001-5969-6194]

Date of data collection: 2022-11-14 to 2022-12-18

Information about geographic location of data collection (if relevant); Belfast, United Kingdom

Related projects:



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PROJECT INFORMATION
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Funder Name: UKRI
Project Number or Identifier: MR/T043172/1

Funder Name: EPSRC
Project Number or Identifier: 2442888 (EP/T518074/1)


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CONTACT INFORMATION
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Author/Principal Investigator information
Name: Raymond McQuaid
ORCID: 0000-0001-5969-6194
Institution: Queen's University Belfast
Email: r.mcquaid@qub.ac.uk

Author/Associate/Co-investigator or Alternate Contact information
Name: Olivia Baxter
ORCID:
Institution: Queen's University Belfast		
Email: obaxter04@qub.ac.uk

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SHARING/ACCESS INFORMATION
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Licenses/restrictions placed on the data, or limitations of reuse: CC BY

c

This dataset supports the publication:
AUTHORS: Olivia E. Baxter, Amit Kumar, J. Marty Gregg & Raymond G. P. McQuaid
TITLE: High Resolution Spatial Mapping of the Electrocaloric Effect in a Multilayer Ceramic Capacitor using Scanning Thermal Microscopy
JOURNAL: Journal of Physics: Energy
PAPER DOI IF KNOWN:

Links to other publicly accessible locations of the data:

Links/relationships to ancillary or related data sets: 


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DATA & FILE OVERVIEW
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This dataset contains:

File list: 
    /Fig2_80micronx20micon_50V_rawdata.h5
    /Fig2_80micronx20micon_75V_rawdata.h5
    /Fig2_80micronx20micon_100V_rawdata.h5
    /Fig4_2x2micron_100V_rawdata.h5

The Hierarchical Data Format version 5 (HDF5 or .h5) files contain all data recorded by the Oxford Instruments Asylum MFP-3D Infinity system during the measurement scans.
Five data channels are recorded in each file: (1) Raw, (2) Deflection, (3) Temperature, (4) Applied Bias, (5) Z Sensor.
Files are named with a convention such that “Fig2_80micronx20micon_100V_rawdata.h5” refers to the 80 micron by 20 micron area investigated in Figure 2 of our paper with 100 V applied to the sample.
Similarly, the file “Fig4_2micronx2micron_100V_rawdata.h5” refers to the 2 micron by 2 micron area studied in Figure 4 with 100 V applied to the sample.


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METHODOLOGICAL INFORMATION
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Description of methods used for collection/generation of data: <Include links or references to publications or other documentation containing experimental design or protocols used in data collection>

Methods for processing the data: A MATLAB script was used to access the raw temperature information, which was then calibrated into real temperature changes through a calibration correction factor.
The total time for the scans was recorded, which meant individual measurement times could be assigned to each data point. Peak temperatures associated with electrocaloric heating/cooling (compared to the baseline average temperature) were extracted from each temperature vs time trace.
This information was then used to create a colormap of electrocaloric temperature changes. In the case of Fig 4, this approach was expanded to look at temperature changes at different points in time, rather than just the maximum temperature changes. <describe how the submitted data were generated from the raw or collected data

Software or instrument-specific information needed to interpret the data: Python

Standards and calibration information, if appropriate: Temperature calibrations were carried out using a temperature controlled stage on Oxford Insturments Asylum MFP-3D Infinity system

Environmental/experimental conditions: All measurements were carried out in ambient conditions

Describe any quality-assurance procedures performed on the data:

People involved with sample collection, processing, analysis and/or submission: Olivia E. Baxter, Amit Kumar, J. Marty Gregg, Raymond G. P. McQuaid


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DATA-SPECIFIC INFORMATION <Create sections for each datafile or set, as appropriate>
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Number of variables: Five variables: (1) Raw, (2) Deflection, (3) Temperature, (4) Applied Bias, (5) Z Sensor.

Number of cases/rows: 

Variable list, defining any abbreviations, units of measure, codes or symbols used: Channel 3 is the temperature measured by the SThM tip during the measurement.
However, this is recorded by the software as a 'Current'. In order to convert to real temperature values in degrees Kelvin, it is necessary to multiply by a calibration factor of 1e9*0.7774. 
   
Missing data codes:

Specialized formats or other abbreviations used: