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.
Inelastic Neutron Scattering Study of Sr(Ag,Zn)Sb vacancy-defective compounds
Abstract: Thermoelectric materials are attracting a great many of attentions due to its ability to transfer the temperature gradients into electrical potentials. Compounds with the ZrBeSi-structure can form with a wide range of compositions and can incorporate large defect concentrations, making it a ripe space to explore structure?property relationships. The most remarkable aspect of the ZrBeSi structure is its ability to accommodate 50% vacancies on the metal-site. Our previous study of SrAgSb and SrZn0.5Sb thermoelectric compounds showed that the vacancies in SrZn0.5Sb significantly enhance lattice anharmonicity, causing a giant softening and broadening of the entire phonon spectrum and, together with defect scattering, leading to a decrease in the lattice thermal conductivity. However, it is not clear whether the anharmonicity of phonons is continuously tunable. We plan to study the evolution of phonon anharmonicity by designing a stepwise increase in the vacancy concentration. Here, we synthesized a series of SrAg1-2xZnxSb (x=0, 0.125, 0.25, 0.375 and 0.5) vacancy-defective compounds. In this proposal, we want to apply inelastic neutron scattering technique to obtain the phonon density of states of SrAg1-2xZnxSb compounds, hence to assess the significance of vacancies in the suppression of lattice thermal conductivity.
Principal Investigator: Miss Cui ping Zhang
Experimenter: Dr Qingyong Ren
Local Contact: Dr Duc Le
DOI: 10.5286/ISIS.E.RB2520168
ISIS Experiment Number: RB2520168
| Part DOI | Instrument | Public release date | Download Link |
|---|---|---|---|
| 10.5286/ISIS.E.RB2520168-1 | MARI | 25 February 2029 | Download |
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:
Miss Cui ping Zhang et al; (2026): Inelastic Neutron Scattering Study of Sr(Ag,Zn)Sb vacancy-defective compounds , STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2520168
Data is released under the CC-BY-4.0 license.
