Abstract
Materials near structural phase transitions find applications in a wide range of devices. Typically, phase transitions are determined macroscopically through measurements of relevant order parameters and related property coefficients. Here, a method for understanding electric field induced phase transitions in ferroelectrically active materials at the nanometer scale via acoustic detection with band‐excitation piezoresponse force microscopy (BE‐PFM) is introduced. Specifically, the field‐induced rhombohedral (R) to tetragonal (T) phase transition in single crystal 0.72PbMg1/3Nb2/3O3‐0.28PbTiO3 (PMN‐PT) is mapped. It is shown that due to sample heterogeneity, some regions are more prone to the R–T transition, and display signatures in the acquired piezoresponse loops, as well as pronounced softening in the elastic modulus (monitored via the resonant frequency and calibrated with models of cantilever dynamics) that occurs just prior to phase switching. Landau–Devonshire thermodynamic theory confirms the stability of the tetragonal phase under applied fields in PMN‐PT, while phase‐field modeling suggests that the transition evolves smoothly in the probed volume of the tip, both in agreement with the BE‐PFM results. These results confirm the validity and utility of utilizing acoustic changes at phase transitions to detect their onset in nanoscale probed volumes, allowing spatial mapping of their onset with unprecedented resolution.
Bibliography
Vasudevan, R. K., Khassaf, H., Cao, Y., Zhang, S., Tselev, A., Carmichael, B., Okatan, M. B., Jesse, S., Chen, L., Alpay, S. P., Kalinin, S. V., & BassiriâGharb, N. (2015). Acoustic Detection of Phase Transitions at the Nanoscale. Advanced Functional Materials, 26(4), 478â486. Portico.
Authors
12
- Rama K. Vasudevan (first)
- Hamidreza Khassaf (additional)
- Ye Cao (additional)
- Shujun Zhang (additional)
- Alexander Tselev (additional)
- Ben Carmichael (additional)
- M. Baris Okatan (additional)
- Stephen Jesse (additional)
- Long‐Qing Chen (additional)
- S. Pamir Alpay (additional)
- Sergei V. Kalinin (additional)
- Nazanin Bassiri‐Gharb (additional)
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49
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Dates
Type | When |
---|---|
Created | 9 years, 8 months ago (Dec. 15, 2015, 7:29 p.m.) |
Deposited | 1 year, 10 months ago (Oct. 6, 2023, 6:05 a.m.) |
Indexed | 3 weeks, 5 days ago (Aug. 7, 2025, 4:58 p.m.) |
Issued | 9 years, 8 months ago (Dec. 15, 2015) |
Published | 9 years, 8 months ago (Dec. 15, 2015) |
Published Online | 9 years, 8 months ago (Dec. 15, 2015) |
Published Print | 9 years, 8 months ago (Jan. 1, 2016) |
@article{Vasudevan_2015, title={Acoustic Detection of Phase Transitions at the Nanoscale}, volume={26}, ISSN={1616-3028}, url={http://dx.doi.org/10.1002/adfm.201504407}, DOI={10.1002/adfm.201504407}, number={4}, journal={Advanced Functional Materials}, publisher={Wiley}, author={Vasudevan, Rama K. and Khassaf, Hamidreza and Cao, Ye and Zhang, Shujun and Tselev, Alexander and Carmichael, Ben and Okatan, M. Baris and Jesse, Stephen and Chen, Long‐Qing and Alpay, S. Pamir and Kalinin, Sergei V. and Bassiri‐Gharb, Nazanin}, year={2015}, month=dec, pages={478–486} }