Frequency dispersion of flexoelectricity in PMN-PT single crystal

Longlong Shu; Meiqian Wan; Xiaoning Jiang; Fei Li; Naigen Zhou; Wenbin Huang; Tong Wang

doi:10.1063/1.4973684

AIP Advances (Jan 2017)

Frequency dispersion of flexoelectricity in PMN-PT single crystal

Longlong Shu,
Meiqian Wan,
Xiaoning Jiang,
Fei Li,
Naigen Zhou,
Wenbin Huang,
Tong Wang

Affiliations

Longlong Shu: School of Materials Science and Engineering, Nanchang University, Nanchang 330031, China
Meiqian Wan: School of Materials Science and Engineering, Nanchang University, Nanchang 330031, China
Xiaoning Jiang: Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, North Carolina 27695, USA
Fei Li: Materials Research Institute, Pennsylvania State University, University Park, Pennsylvania 16802, USA
Naigen Zhou: School of Materials Science and Engineering, Nanchang University, Nanchang 330031, China
Wenbin Huang: The State Key Lab of Mechanical Transmissions, Chongqing University, Chongqing 400044, China
Tong Wang: School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China

DOI: https://doi.org/10.1063/1.4973684
Journal volume & issue: Vol. 7, no. 1
pp. 015010 – 015010-6

Abstract

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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.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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