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arXiv · 1701.07740

Barkhausen Noise Probe of the Ferroelectric Transition in the Relaxor PbMg1/3Nb2/3O3-12% PbTiO3

Xinyang Zhang·Corbyn Mellinger·Eugene V. Colla·M. B. Weissman·D. D. Viehland
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Abstract

Barkhausen current noise is used to probe the slow field-driven conversion of the glassy relaxor ferroelectric state to an ordered ferroelectric (FE) state. The frequent presence of distinct micron-scale Barkhausen events well before the polarization current starts to speed up shows that the process is not a conventional nucleation-limited one. The prevalence of reverse switching events near the onset of the rapid part of the transition strongly indicates that electric dipole interactions play a key role. The combination of Barkhausen noise changes and changes in the complex dielectric response indicate that the process consists of an initial mixed-alignment domain formation stage followed by growth of the domains aligned with the applied field.

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Xinyang Zhang, Corbyn Mellinger, Eugene V. Colla, M. B. Weissman, D. D. Viehland. 2017-02-09. Barkhausen Noise Probe of the Ferroelectric Transition in the Relaxor PbMg1/3Nb2/3O3-12% PbTiO3. https://doi.org/10.1103/physrevb.95.144203

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