Macroscopic polarization in the nominally ergodic relaxor state of lead magnesium niobate
| Autor: | Brahim Dkhil, Lukas M. Riemer, Dragan Damjanovic, Hana Uršič, Andrew J. Bell, Kanghyun Chu, Yang Li |
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| Přispěvatelé: | Laboratoire Structures, Propriétés et Modélisation des solides (SPMS), Institut de Chimie du CNRS (INC)-CentraleSupélec-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) Annealing (metallurgy) FOS: Physical sciences 02 engineering and technology 01 natural sciences Condensed Matter::Materials Science Electric field 0103 physical sciences Nano Ceramic ComputingMilieux_MISCELLANEOUS 010302 applied physics [PHYS]Physics [physics] Condensed Matter - Materials Science Condensed matter physics Materials Science (cond-mat.mtrl-sci) 021001 nanoscience & nanotechnology 3. Good health Pyroelectricity Amplitude visual_art visual_art.visual_art_medium Polar 0210 nano-technology Burns temperature |
| Zdroj: | Applied Physics Letters Applied Physics Letters, American Institute of Physics, 2020, 117 (10), pp.102901. ⟨10.1063/5.0018243⟩ |
| ISSN: | 0003-6951 |
| Popis: | Macroscopic polarity and its dynamic response to external electric fields and temperature in the nominally ergodic relaxor phase of pristine lead magnesium niobate crystals and ceramics, Pb(Mg1/3Nb2/3)O3 (PMN), were investigated. Dynamic pyroelectric measurements provide evidence for persistent macroscopic polarity of the samples. Annealing experiments below and above Burns temperature of polarized samples relate this polarity to the presence of polar nano entities and their dynamics. The dc electric field strength required for macroscopic polarization reversal is similar to the amplitude of the ac field where dynamic nonlinear dielectric permittivity reaches maximum. Consequently, the aforementioned maximum is related to the reorientation of polar nano entities. The results question the existence of an ergodic state in PMN below Burns temperature. Comment: 14 pages main text, 5 pages supplementary information |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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