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Interface Engineering of Domain Structures in BiFeO3 Thin Films.

Authors :
Deyang Chen
Zuhuang Chen
Qian He
Clarkson, James D.
Serrao, Claudy R.
Yadav, Ajay K.
Nowakowski, Mark E.
Zhen Fan
Long You
Xingsen Gao
Dechang Zeng
Lang Chen
Borisevich, Albina Y.
Salahuddin, Sayeef
Jun-Ming Liu
Bokor, Jeffrey
Source :
Nano Letters. Jan2017, Vol. 17 Issue 1, p486-493. 8p.
Publication Year :
2017

Abstract

A wealth of fascinating phenomena have been discovered at the BiFeO3 domain walls, examples such as domain wall conductivity, photovoltaic effects, and magnetoelectric coupling. Thus, the ability to precisely control the domain structures and accurately study their switching behaviors is critical to realize the next generation of novel devices based on domain wall functionalities. In this work, the introduction of a dielectric layer leads to the tunability of the depolarization field both in the multilayers and superlattices, which provides a novel approach to control the domain patterns of BiFeO3 films. Moreover, we are able to study the switching behavior of the first time obtained periodic 109° stripe domains with a thick bottom electrode. Besides, the precise controlling of pure 71° and 109° periodic stripe domain walls enable us to make a clear demonstration that the exchange bias in the ferromagnet/BiFeO3 system originates from 109° domain walls. Our findings provide future directions to study the room temperature electric field control of exchange bias and open a new pathway to explore the room temperature multiferroic vortices in the BiFeO3 system. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
15306984
Volume :
17
Issue :
1
Database :
Academic Search Index
Journal :
Nano Letters
Publication Type :
Academic Journal
Accession number :
120812313
Full Text :
https://doi.org/10.1021/acs.nanolett.6b04512