biostudies-literatureHan HAgencia Estatal de Investigaci??nAlexander von Humboldt-StiftungHorizon 20206206-6214https://www.ebi.ac.uk/biostudies/studies/S-EPMC9047007biostudies-literatureUnknown16(4)Oxygen defects and their atomic arrangements play a significant role in the physical properties of many transition metal oxides. The exemplary perovskite SrCoO_3-δ (<i>P-</i>SCO) is metallic and ferromagnetic. However, its daughter phase, the brownmillerite SrCoO_2.5 (<i>BM-</i>SCO), is insulating and an antiferromagnet. Moreover, <i>BM-</i>SCO exhibits oxygen vacancy channels (OVCs) that in thin films can be oriented either horizontally (<i>H</i>-SCO) or vertically (<i>V</i>-SCO) to the film's surface. To date, the orientation of these OVCs has been manipulated by control of the thin film deposition parameters or by using a substrate-induced strain. Here, we present a method to electrically control the OVC ordering in thin layers via ionic liquid gating (ILG). We show ACS nanoControl of Oxygen Vacancy Ordering in Brownmillerite Thin Films via Ionic Liquid Gating.PMC9047007PID2020-116181RB-C32PCI2019-111908-2Alexander von Humboldt Professorship737109Yoon JSharma AParkin SSPMeyerheim HLDeniz HJeon KRHan HGargiani PGuillemard CSharma AKMohseni KValvidares MfalseControl of Oxygen Vacancy Ordering in Brownmillerite Thin Films via Ionic Liquid Gating.Oxygen defects and their atomic arrangements play a significant role in the physical properties of many transition metal oxides. The exemplary perovskite SrCoO_3-δ (<i>P-</i>SCO) is metallic and ferromagnetic. However, its daughter phase, the brownmillerite SrCoO_2.5 (<i>BM-</i>SCO), is insulating and an antiferromagnet. Moreover, <i>BM-</i>SCO exhibits oxygen vacancy channels (OVCs) that in thin films can be oriented either horizontally (<i>H</i>-SCO) or vertically (<i>V</i>-SCO) to the film's surface. To date, the orientation of these OVCs has been manipulated by control of the thin film deposition parameters or by using a substrate-induced strain. Here, we present a method to electrically control the OVC ordering in thin layers via ionic liquid gating (ILG). We show 2022-01-01T00:00:00Z2022 Apr2025-04-25T23:00:29.979Z2025-04-06T09:13:43.743ZS-EPMC90470073537760810.1021/acsnano.2c00012