April 22 - 26, 2024
Seattle, Washington
May 7 - 9, 2024 (Virtual)

Event Supporters

2024 MRS Spring Meeting
EL06.08.06

Scanning Oscillator Piezoresponse Microscopy: New Tools to Explore Domain Wall Dynamics

When and Where

Apr 25, 2024
3:45pm - 4:00pm
Room 343, Level 3, Summit

Presenter(s)

Co-Author(s)

Stephen Jesse1,Neus Domingo Marimon1,Shivaranjan Raghuraman1,Kyle Kelley1

Oak Ridge National Laboratory1

Abstract

Stephen Jesse1,Neus Domingo Marimon1,Shivaranjan Raghuraman1,Kyle Kelley1

Oak Ridge National Laboratory1
Dynamics of ferroelectric domain walls associated to domain wall switching are known to depend on bulk structure, being very sensitive to defects, chemical and structural pinning sites, as well as environmental conditions, modifying the electronic boundary conditions associated with screening dynamics. However, domain walls also show a sub-coercive field dynamics as a reversible motion, with vibrational states that strongly couple to local structure and composition of the domain wall. In this presentation, we will show a novel microscopy mode based on a multifrequency approach which allows us to quantify domain wall oscillations under applied sub-coercive electric field, while simultaneously disentangle electrostatic from net eletromechanical signals, which can introduce severe distortions on the net piezoelectric response around neutral domain walls. This technique allows quick visualization of domain wall displacement, their velocities and dependence on pre-existing domain configurations and defects. When applied to lead titanate, this technique shows significant oscillations of the 180° domain walls between the antiparallel c+/c- domains. Further, the displacement and velocities distinctly depend on existing a-c domain structures and relative orientations of domains. This technique can be readily applied to other heterostructures under a wide range of stimuli such as light, heat, force and bias.

Keywords

oxide | scanning probe microscopy (SPM)

Symposium Organizers

Aiping Chen, Los Alamos National Laboratory
Woo Seok Choi, Sungkyunkwan University
Marta Gibert, Technische Universität Wien
Megan Holtz, Colorado School of Mines

Symposium Support

Silver
Korea Vacuum Tech, Ltd.

Bronze
Center for Integrated Nanotechnologies, Los Alamos National Laboratory
Radiant Technologies, Inc.

Session Chairs

Aiping Chen
Gertjan Koster

In this Session