Academic Journal
X-ray-induced piezoresponse during X-ray photon correlation spectroscopy of PbMg1/3Nb2/3O3
| العنوان: | X-ray-induced piezoresponse during X-ray photon correlation spectroscopy of PbMg1/3Nb2/3O3 |
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| المؤلفون: | Dina Sheyfer, Hao Zheng, Matthew Krogstad, Carol Thompson, Hoydoo You, Jeffrey A. Eastman, Yuzi Liu, Bi-Xia Wang, Zuo-Guang Ye, Stephan Rosenkranz, Daniel Phelan, Eric M. Dufresne, G. Brian Stephenson, Yue Cao |
| المصدر: | Journal of Synchrotron Radiation, Vol 31, Iss 1, Pp 55-64 (2024) |
| بيانات النشر: | International Union of Crystallography, 2024. |
| سنة النشر: | 2024 |
| المجموعة: | LCC:Nuclear and particle physics. Atomic energy. Radioactivity LCC:Crystallography |
| مصطلحات موضوعية: | x-ray photon correlation spectroscopy, relaxor, surface charging, x-ray-induced piezoresponse, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798, Crystallography, QD901-999 |
| الوصف: | X-ray photon correlation spectroscopy (XPCS) holds strong promise for observing atomic-scale dynamics in materials, both at equilibrium and during non-equilibrium transitions. Here an in situ XPCS study of the relaxor ferroelectric PbMg1/3Nb2/3O3 (PMN) is reported. A weak applied AC electric field generates strong response in the speckle of the diffuse scattering from the polar nanodomains, which is captured using the two-time correlation function. Correlated motions of the Bragg peak are also observed, which indicate dynamic tilting of the illuminated volume. This tilting quantitatively accounts for the observed two-time speckle correlations. The magnitude of the tilting would not be expected solely from the modest applied field, since PMN is an electrostrictive material with no linear strain response to the field. A model is developed based on non-uniform static charging of the illuminated surface spot by the incident micrometre-scale X-ray beam and the electrostrictive material response to the combination of static and dynamic fields. The model qualitatively explains the direction and magnitude of the observed tilting, and predicts that X-ray-induced piezoresponse could be an important factor in correctly interpreting results from XPCS and nanodiffraction studies of other insulating materials under applied AC field or varying X-ray illumination. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1600-5775 16005775 |
| Relation: | http://scripts.iucr.org/cgi-bin/paper?S1600577523009116; https://doaj.org/toc/1600-5775 |
| DOI: | 10.1107/S1600577523009116 |
| URL الوصول: | https://doaj.org/article/fc8f7f346547420ba2ff26ea98e20b3e |
| رقم الانضمام: | edsdoj.fc8f7f346547420ba2ff26ea98e20b3e |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 16005775 |
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| DOI: | 10.1107/S1600577523009116 |