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180° Ferroelectric Stripe Nanodomains in BiFeO3 Thin Films.
Nano Lett 2015; 15(10):6506-13NL

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 enhancement in heterostructures based on BiFeO3 with 180° domain walls and an absence of exchange bias in heterostructures based on BiFeO3 with 71° domain walls; suggesting that the 180° domain walls could be the possible source for pinned uncompensated spins that give rise to exchange bias. This is further confirmed by X-ray circular magnetic dichroism studies, which demonstrate that films with predominantly 180° domain walls have larger magnetization than those with primarily 71° domain walls. Our results could be useful to extract the structure of domain walls and to explore domain wall functionalities in BiFeO3.

Authors+Show Affiliations

No affiliation info availableNo affiliation info availableHubei Collaborative Innovation Centre for Advanced Organic Chemical Materials, Key Laboratory of Green Preparation and Application for Materials, Ministry of Education, Department of Materials Science and Engineering, Hubei University , Wuhan 430062, P. R. China.No affiliation info availableNo affiliation info availableNo affiliation info availableDepartment of Materials Science and Engineering and Materials Research Laboratory, University of Illinois , Urbana-Champaign, Urbana, Illinois 61801, United States.No affiliation info availableDepartment of Materials Science and Engineering and Materials Research Laboratory, University of Illinois , Urbana-Champaign, Urbana, Illinois 61801, United States. International Institute for Carbon Neutral Research, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.International Institute for Carbon Neutral Research, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

26317408

Citation

Chen, Zuhuang, et al. "180° Ferroelectric Stripe Nanodomains in BiFeO3 Thin Films." Nano Letters, vol. 15, no. 10, 2015, pp. 6506-13.
Chen Z, Liu J, Qi Y, et al. 180° Ferroelectric Stripe Nanodomains in BiFeO3 Thin Films. Nano Lett. 2015;15(10):6506-13.
Chen, Z., Liu, J., Qi, Y., Chen, D., Hsu, S. L., Damodaran, A. R., ... Martin, L. W. (2015). 180° Ferroelectric Stripe Nanodomains in BiFeO3 Thin Films. Nano Letters, 15(10), pp. 6506-13. doi:10.1021/acs.nanolett.5b02031.
Chen Z, et al. 180° Ferroelectric Stripe Nanodomains in BiFeO3 Thin Films. Nano Lett. 2015 Oct 14;15(10):6506-13. PubMed PMID: 26317408.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - 180° Ferroelectric Stripe Nanodomains in BiFeO3 Thin Films. AU - Chen,Zuhuang, AU - Liu,Jian, AU - Qi,Yajun, AU - Chen,Deyang, AU - Hsu,Shang-Lin, AU - Damodaran,Anoop R, AU - He,Xiaoqing, AU - N'Diaye,Alpha T, AU - Rockett,Angus, AU - Martin,Lane W, Y1 - 2015/09/01/ PY - 2015/8/29/entrez PY - 2015/9/1/pubmed PY - 2015/9/1/medline KW - BiFeO3 KW - domain walls KW - exchange bias KW - ferroelectric KW - multiferroic KW - strain SP - 6506 EP - 13 JF - Nano letters JO - Nano Lett. VL - 15 IS - 10 N2 - 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 enhancement in heterostructures based on BiFeO3 with 180° domain walls and an absence of exchange bias in heterostructures based on BiFeO3 with 71° domain walls; suggesting that the 180° domain walls could be the possible source for pinned uncompensated spins that give rise to exchange bias. This is further confirmed by X-ray circular magnetic dichroism studies, which demonstrate that films with predominantly 180° domain walls have larger magnetization than those with primarily 71° domain walls. Our results could be useful to extract the structure of domain walls and to explore domain wall functionalities in BiFeO3. SN - 1530-6992 UR - https://www.unboundmedicine.com/medline/citation/26317408/180°_Ferroelectric_Stripe_Nanodomains_in_BiFeO3_Thin_Films_ L2 - https://dx.doi.org/10.1021/acs.nanolett.5b02031 DB - PRIME DP - Unbound Medicine ER -