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

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.