180° Ferroelectric Stripe Nanodomains in BiFeO3 Thin Films

Nano Letters
Zuhuang ChenL W Martin

Abstract

There is growing evidence that domain walls in ferroics can possess emergent properties that are absent in the bulk. For example, 180° ferroelectric domain walls in the ferroelectric-antiferromagnetic BiFeO3 are particularly interesting because they have been predicted to possess a range of intriguing behaviors, including electronic conduction and enhanced magnetization. To date, however, ordered arrays of such domain structures have not been reported. Here, we report the observation of 180° stripe nanodomains in (110)-oriented BiFeO3 thin films grown on orthorhombic GdScO3 (010)O substrates and their impact on exchange coupling to metallic ferromagnets. Nanoscale ferroelectric 180° stripe domains with {112̅} domain walls were observed in films <32 nm thick. With increasing film thickness, we observed a domain structure crossover from the depolarization field-driven 180° stripe nanodomains to 71° ferroelastic domains determined by the elastic energy. These 180° domain walls (which are typically cylindrical or meandering in nature due to a lack of strong anisotropy associated with the energy of such walls) are found to be highly ordered. Additional studies of Co0.9Fe0.1/BiFeO3 heterostructures reveal exchange bias and exchange e...Continue Reading

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Citations

Aug 20, 2016·Nature Communications·Xian-Kui WeiNava Setter
Aug 21, 2020·Advanced Materials·Shanquan ChenZuhuang Chen
May 18, 2016·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Anoop R DamodaranLane W Martin
Sep 28, 2017·Physical Review Letters·Jirka HlinkaPavel Marton
Sep 23, 2018·Nature Communications·Zuhuang ChenLane W Martin
Jul 13, 2021·Nano Letters·Yunlong TangXiuliang Ma
Dec 10, 2016·Nano Letters·Deyang ChenJeffrey Bokor
Nov 13, 2021·Nano Letters·Wanrong GengXiuliang Ma

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