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Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement
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Engineering Domain Variants in 0.7Pb(Mg1/3Nb2/3)-0.3PbTiO3 Single Crystals Using High-Frequency AC Poling.

Dawei Zhang1,2, Linglong Li3, Lei Wang1

  • 1School of Materials Science and Engineering, UNSW Sydney, Sydney, New South Wales, 2052, Australia.

Small Methods
|March 21, 2024
PubMed
Summary

High-frequency alternating current (AC) poling of lead magnesium niobate-lead titanate (PMN-30PT) crystals reveals new needle-shaped domains and 109° domain walls. This domain engineering advances transducer technology.

Keywords:
PMN‐PT single crystalengineered domain structurehigh‐frequency AC poling

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Area of Science:

  • Materials Science
  • Solid State Physics
  • Crystallography

Background:

  • Single crystals of 0.7Pb(Mg1/3Nb2/3)-0.3PbTiO3 (PMN-30PT) exhibit excellent dielectric and electromechanical properties near the morphotropic phase boundary.
  • Alternating current (AC) electric field poling enhances these properties, but the underlying domain dynamics under high frequencies are not well understood.

Purpose of the Study:

  • To investigate the microscopic domain structure and dynamics in PMN-30PT crystals under high-frequency AC poling.
  • To understand the role of domain variants and domain walls in material performance under AC electric fields.

Main Methods:

  • Utilized a combination of scanning probe microscopy and X-ray diffraction (XRD) reciprocal space mapping.
  • Employed time-resolved Kelvin probe force microscopy (KPFM) to study charge dynamics.

Main Results:

  • Identified four monoclinic (MA) domain variants under AC poling.
  • Observed the emergence of hierarchical fine domains, specifically needle-shaped domains and 109° domain walls.
  • KPFM revealed charge dynamics and relaxation behavior within these needle domains and walls.

Conclusions:

  • High-frequency AC poling induces a unique domain microstructure in PMN-30PT crystals.
  • The findings offer insights into domain engineering for advanced transducer applications.