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Mesoscopic harmonic mapping of electromechanical response in a relaxor ferroelectric

Journal Article


Abstract


  • Relaxor-ferroelectrics are renowned for very large electrostrictive response, enabling applications

    in transducers, actuators, and energy harvesters. However, insight into the dissimilar contributions

    (polarization rotation, wall motion) to the electromechanical response from electrostrictive strain,

    and separation of such contributions from linear piezoelectric response are largely ignored at the

    mesoscale. Here, we employ a band-excitation piezoresponse force microscopy (BE-PFM) technique

    to explore the first and second harmonics of the piezoelectric response in prototypical

    relaxor-ferroelectric 0.72Pb(Mg1/3Nb2/3)O3-0.28PbTiO3 (PMN-0.28PT) single crystals. Third order

    polynomial fitting of the second harmonic reveals considerable correlation between the cubic coefficient

    map and the first harmonic piezoresponse amplitude. These results are interpreted under a

    modified Rayleigh framework, as evidence for domain wall contributions to enhanced electromechanical

    response. These studies highlight the contribution of domain wall motion in the electromechanical

    response of relaxor ferroelectrics, and further show the utility of harmonic BE-PFM

    measurements in spatially mapping the mesoscopic variability inherent in disordered systems.

UOW Authors


  •   Vasudevan, Rama (external author)
  •   Zhang, Shujun
  •   Ding, Jilai (external author)
  •   Okatan, M. (external author)
  •   Jesse, Stephen (external author)
  •   Kalinin, Sergei V. (external author)
  •   Bassiri-Gharb, Nazanin (external author)

Publication Date


  • 2015

Citation


  • Vasudevan, R. K., Zhang, S., Ding, J., Okatan, M., Jesse, S., Kalinin, S. V. & Bassiri-Gharb, N. (2015). Mesoscopic harmonic mapping of electromechanical response in a relaxor ferroelectric. Applied Physics Letters, 106 (22), 222901-1-222901-5.

Scopus Eid


  • 2-s2.0-84930627957

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2848

Start Page


  • 222901-1

End Page


  • 222901-5

Volume


  • 106

Issue


  • 22

Place Of Publication


  • United States

Abstract


  • Relaxor-ferroelectrics are renowned for very large electrostrictive response, enabling applications

    in transducers, actuators, and energy harvesters. However, insight into the dissimilar contributions

    (polarization rotation, wall motion) to the electromechanical response from electrostrictive strain,

    and separation of such contributions from linear piezoelectric response are largely ignored at the

    mesoscale. Here, we employ a band-excitation piezoresponse force microscopy (BE-PFM) technique

    to explore the first and second harmonics of the piezoelectric response in prototypical

    relaxor-ferroelectric 0.72Pb(Mg1/3Nb2/3)O3-0.28PbTiO3 (PMN-0.28PT) single crystals. Third order

    polynomial fitting of the second harmonic reveals considerable correlation between the cubic coefficient

    map and the first harmonic piezoresponse amplitude. These results are interpreted under a

    modified Rayleigh framework, as evidence for domain wall contributions to enhanced electromechanical

    response. These studies highlight the contribution of domain wall motion in the electromechanical

    response of relaxor ferroelectrics, and further show the utility of harmonic BE-PFM

    measurements in spatially mapping the mesoscopic variability inherent in disordered systems.

UOW Authors


  •   Vasudevan, Rama (external author)
  •   Zhang, Shujun
  •   Ding, Jilai (external author)
  •   Okatan, M. (external author)
  •   Jesse, Stephen (external author)
  •   Kalinin, Sergei V. (external author)
  •   Bassiri-Gharb, Nazanin (external author)

Publication Date


  • 2015

Citation


  • Vasudevan, R. K., Zhang, S., Ding, J., Okatan, M., Jesse, S., Kalinin, S. V. & Bassiri-Gharb, N. (2015). Mesoscopic harmonic mapping of electromechanical response in a relaxor ferroelectric. Applied Physics Letters, 106 (22), 222901-1-222901-5.

Scopus Eid


  • 2-s2.0-84930627957

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2848

Start Page


  • 222901-1

End Page


  • 222901-5

Volume


  • 106

Issue


  • 22

Place Of Publication


  • United States