ISIS Neutron and Muon Source Data Journal
This is a page describing data taken during an experiment at the ISIS Neutron and Muon Source. Information about the ISIS Neutron and Muon Source can be found at https://www.isis.stfc.ac.uk.
Negative Thermal Expansion in the (Bi0.5Na0.5)1-x(Ba0.4Sr0.6)xTiO3 System
Abstract: The (Bi0.5Na0.5)1-x(Ba0.4Sr0.6)xTiO3 (BNT-BST) is being investigated as a lead-free ferroelectric system for energy storage capacitors. At x = 0.2 BNT-BST exhibits a tetragonally distorted perovskite structure. Dielectric measurements reveal two anomalies at ca. 125 C (ferroelectric to relaxor-ferroelectric) and 360 C (relaxor-ferroelectric to paraelectric). The former is associated with a change in structure from tetragonal to cubic symmetry, which involves a 25 C range of negative thermal expansion (NTE), where a dynamic deformation of the structure appears to consume some free space leading to volume shrinkage. The aim of this work is to characterise this dynamic structural deformation in the NTE region as well as the more subtle high temperature transition.
Public release date: 24 September 2023
Principal Investigator: Dr Isaac Abrahams
Experimenter: Dr Haixue Yan
Experimenter: Mr Hongtao Zhang
Local Contact: Dr Dominic Fortes
Experimenter: Miss zimeng hu
DOI: 10.5286/ISIS.E.RB2010122-1
Parent DOI: 10.5286/ISIS.E.RB2010122
ISIS Experiment Number: RB2010122
Part Number: 1
Date of Experiment: 22 September 2020
Publisher: STFC ISIS Neutron and Muon Source
Data format: RAW/Nexus
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Data Citation
The recommended format for citing this dataset in a research
publication is as:
[author], [date], [title], [publisher],
[doi]
For Example:
Dr Isaac Abrahams et al; (2020): Negative Thermal Expansion in the (Bi0.5Na0.5)1-x(Ba0.4Sr0.6)xTiO3 System, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2010122-1
Data is released under the CC-BY-4.0 license.
