Room-Temperature AFM Electric-Field-Induced Topotactic Transformation between Perovskite and Brownmillerite SrFeOx with Sub-Micrometer Spatial Resolution

Ferreiro-Vila, E. ; Blanco-Canosa, S. ; Lucas del Pozo, I. (Universidad de Zaragoza) ; Vasili, H.B. ; Magén, C. (Universidad de Zaragoza) ; Ibarra, A. (Universidad de Zaragoza) ; Rubio-Zuazo, J. ; Castro, G.R. ; Morellón, L. (Universidad de Zaragoza) ; Rivadulla, F.

Resumen: Reversible structural transformations between perovskite (PV) ABO3- d and brownmillerite (BM) ABO2.5 (A = Ca2+, Sr2+; B = Fe4+/3, Co4+/3+) oxides can be induced by topotactic oxygen exchange at moderate temperatures under reducing/oxidizing conditions. The combination of a large oxide-ion conductivity and a small free energy difference between the 4+/3+ oxidation states of many 3d transition metal ions enables these topotactic transformations. Herein, it is demonstrated that the electric field produced by a voltage-biased atomic force microscopy tip can induce such transformation between PV SrFeO3- d and BM SrFeO2.5 at room temperature and with sub-micrometer spatial resolution. Interestingly, the structural transformation is kept after the electric field is removed, allowing a nonvolatile control of the local chemical, electrical, optical, and magnetic properties. Thus, the results presented in this paper open the door for the fabrication of stable ionic-based devices through the electric field patterning of different crystallographic phases.

Idioma: Inglés

DOI: 10.1002/adfm.201901984

Año: 2019

Publicado en: Advanced Functional Materials 29, 48 (2019), 1901984 [8 pp]
ISSN: 1616-301X

Factor impacto JCR: 16.836 (2019)

Categ. JCR: CHEMISTRY, PHYSICAL rank: 7 / 158 = 0.044 (2019) - Q1 - T1
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 13 / 314 = 0.041 (2019) - Q1 - T1
Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 6 / 103 = 0.058 (2019) - Q1 - T1
Categ. JCR: PHYSICS, CONDENSED MATTER rank: 4 / 69 = 0.058 (2019) - Q1 - T1
Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 10 / 177 = 0.056 (2019) - Q1 - T1
Categ. JCR: PHYSICS, APPLIED rank: 7 / 154 = 0.045 (2019) - Q1 - T1

Factor impacto SCIMAGO: 5.875 - Biomaterials (Q1) - Chemistry (miscellaneous) (Q1) - Condensed Matter Physics (Q1) - Nanoscience and Nanotechnology (Q1) - Electronic, Optical and Magnetic Materials (Q1) - Materials Science (miscellaneous) (Q1) - Electrochemistry (Q1)

Financiación: info:eu-repo/grantAgreement/EC/H2020/734187/EU/Spin conversion, logic storage in oxide-based electronics/SPICOLOST
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2016-80762-R
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2017-82970-C2-2-R

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)