In-Situ Bragg Coherent Diffraction Imaging ofDomain Wall Motion in Multiferroic DyMnO3 Nanocrystal

Abstract Multiferroic materials which exhibit interacting and coexisting properties, like ferroelectricity and ferromagnetism, possess significant potential in the development of novel technologies that can be controlled through the application of external fields. They also exhibit varying regions of polarity, known as domains,with the interfaces that separate the domains referred to as domain walls. In this study, using three-dimensional Bragg Coherent Diffractive Imaging (BCDI), we investigate the dynamics of multiferroic domain wall motion in a single hexagonal dysprosium manganite (h-DyMnO3 ) nanocrystal under varying applied electricfield. Our analysis reveals the dynamics of the ferroelectric polarisation where switching of the direction was achieved with an applied field of less than 0.3 V.