Sub‐Nanosecond Reconfiguration of Ferroelectric Domains in Bismuth Ferrite
Domain switching is crucial for achieving desired functions in ferroic materials that are used in various applications. Fast control of domains at sub‐nanosecond timescales remains a challenge despite its potential for high‐speed operation in random‐access memories, photonic, and nanoelectronic devi...
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Published in | Advanced materials (Weinheim) Vol. 35; no. 44; pp. e2306029 - n/a |
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Main Authors | , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Weinheim
Wiley Subscription Services, Inc
01.11.2023
Wiley |
Subjects | |
Online Access | Get full text |
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Summary: | Domain switching is crucial for achieving desired functions in ferroic materials that are used in various applications. Fast control of domains at sub‐nanosecond timescales remains a challenge despite its potential for high‐speed operation in random‐access memories, photonic, and nanoelectronic devices. Here, ultrafast laser excitation is shown to transiently melt and reconfigure ferroelectric stripe domains in multiferroic bismuth ferrite on a timescale faster than 100 picoseconds. This dynamic behavior is visualized by picosecond‐ and nanometer‐resolved X‐ray diffraction and time‐resolved X‐ray diffuse scattering. The disordering of stripe domains is attributed to the screening of depolarization fields by photogenerated carriers resulting in the formation of charged domain walls, as supported by phase‐field simulations. Furthermore, the recovery of disordered domains exhibits subdiffusive growth on nanosecond timescales, with a non‐equilibrium domain velocity reaching up to 10 m s−1. These findings present a new approach to image and manipulate ferroelectric domains on sub‐nanosecond timescales, which can be further extended into other complex photoferroic systems to modulate their electronic, optical, and magnetic properties beyond gigahertz frequencies. This approach could pave the way for high‐speed ferroelectric data storage and computing, and, more broadly, defines new approaches for visualizing the non‐equilibrium dynamics of heterogeneous and disordered materials.
Upon pulsed photoexcitation, multiferroic bismuth ferrite thin film exhibits a sub‐nanosecond melting of their periodic stripe domains. The disordered domains recover back to their original state over few nanosecond timescale. The ultrafast manipulation of domains can be used for fast speed operation in applications of ferroelectrics. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF) USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE) USDOE AC02-76SF00515; AC02-06CH11357; SC-002014; SC-0012375 |
ISSN: | 0935-9648 1521-4095 |
DOI: | 10.1002/adma.202306029 |