Three-dimensional polarization imaging of (Ba,Sr)TiO3:MgO composites
Patrick Irvin, Ruyan Guo, Amar Bhalla, Jeremy Levy
TL;DR
This study employs advanced 3D optical microscopy techniques to map the polarization structure and dynamics in (Ba,Sr)TiO3:MgO composites, revealing how phase connectivity influences dielectric properties.
Contribution
It introduces a combined use of SH-CSOM and TR-CSOM to spatially and temporally characterize polarization in complex composites, providing new insights into phase interactions.
Findings
Homogeneous polarization within (Ba,Sr)TiO3 regions
Connected regions exhibit uniform polarization response
Mapping techniques reveal phase connectivity effects
Abstract
The dielectric tuning and loss of (Ba,Sr)TiO3:MgO bulk composites depend strongly on the connectivity and interaction among the two phases. To investigate this relationship, the polar structure and dynamics of these composites is mapped as a function of space and time using a pair of three-dimensional probes: second-harmonic confocal scanning optical microscopy (SH-CSOM), which maps ferroelectric polarization in three dimensions, and time-resolved scanning optical microscopy (TR-CSOM), which maps polarization dynamics along two spatial dimensions and one time dimension. SH-CSOM measurements reveal a high degree of homogeneity within the (Ba,Sr)TiO3 regions, while TR-CSOM measurements indicate that topologically connected regions respond with a spatially uniform phase.
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