Frequency dispersion of flexoelectricity in PMN-PT single crystal
Author(s) -
Longlong Shu,
Meiqian Wan,
Xiaoning Jiang,
Fei Li,
Naigen Zhou,
Wenbin Huang,
Tong Wang
Publication year - 2017
Publication title -
aip advances
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 58
ISSN - 2158-3226
DOI - 10.1063/1.4973684
Subject(s) - flexoelectricity , dispersion (optics) , condensed matter physics , relaxation (psychology) , materials science , frequency dependence , low frequency , crystal (programming language) , single crystal , dispersion relation , nuclear magnetic resonance , physics , optics , liquid crystal , computer science , programming language , psychology , social psychology , astronomy
The mechanism of the recent discovered enhanced flexoelectricity in perovskites has brought about numerous controversies which still remain unclear. In this paper, we employed relaxor 0.68Pb(Mg2/3Nb1/3)O3 -0.32PbTiO3 (PMN-PT) single crystals for study. The observed flexoelectric coefficient in PMN-PT single crystal reaches up to 100 μC/m, and in a relative low frequency range, exhibits an abnormal frequency dispersion phenomenon with a positive relationship with frequency. Such frequency dispersion regulation is different from the normal relaxation behavior that usually occur a time delay, and hence proves the flexoelectricity acting more like bulk effect rather than surface effect in this kind of materials
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