High-resolution 2-D Bragg diffraction reveal heterogeneous domain transformation behavior in a bulk relaxor ferroelectric

Abhijit Pramanick; Alexandru D. Stoica; Ke An

doi:10.1063/1.4962270

High-resolution 2-D Bragg diffraction reveal heterogeneous domain transformation behavior in a bulk relaxor ferroelectric

Abhijit Pramanick, Alexandru D. Stoica, Ke An

Materials Engineering

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

In-situ measurement of fine-structure of neutron Bragg diffraction peaks from a relaxor single-crystal using a time-of-flight instrument reveals highly heterogeneous mesoscale domain transformation behavior under applied electric fields. It is observed that only ∼25% of domains undergo reorientation or phase transition contributing to large average strains, while at least 40% remain invariant and exhibit microstrains. Such insights could be central for designing new relaxor materials with better performance and longevity. The current experimental technique can also be applied to resolve complex mesoscale phenomena in other functional materials.

Original language	English
Article number	092907
Journal	Applied Physics Letters
Volume	109
Issue number	9
DOIs	https://doi.org/10.1063/1.4962270
State	Published - Aug 29 2016

Funding

A.P. acknowledges the funding support from the City University of Hong Kong. Research conducted at ORNL's Spallation Neutron Source was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy. The authors acknowledge H. D. Skorpenske for his technical support for the neutron experiment. Some equipment for this project were procured through funding from a Laboratory Directed Research and Development project at ORNL.

Funders	Funder number
Office of Basic Energy Sciences
Scientific User Facilities Division
U.S. Department of Energy
Oak Ridge National Laboratory
Laboratory Directed Research and Development
City University of Hong Kong

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High-resolution 2-D Bragg diffraction reveal heterogeneous domain transformation behavior in a bulk relaxor ferroelectric

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