Strain-Engineered Tetragonal Phase and Ferroelectricity in GdMnO3 Thin Films Grown on SrTiO3 (001)

• Type: Article in International Scientific Journal
• Date: 2019

Authors

Machado, P (Author) Other; Figueiras, FG (Author) FCUP; Vilarinho, R (Author) Other; Fernandes, JRA (Author) Other; Tavares, PB (Author) Other; Rosario Soares, MR (Author) Other; Cardoso, S (Author) Other; Silva, JPB (Author) Other; Almeida, A (Author) FCUP; Agostinho Moreira, JA (Author) FCUP

Journal

Title: Scientific Reports

Vol. 9 No. 3413

ISSN: 2045-2322

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 2 Citations

Scopus - 2 Citations

Other information

Authenticus ID: P-00R-FVP

DOI: 10.1038/s41598-019-55227-2

Abstract (EN): A previously unreported tetragonal phase has been discovered in a epitaxially strained GdMnO3 thin films deposited on (001)-oriented SrTiO3 substrates by radio frequency (RF) magnetron sputtering. The tetragonal axis of the films grown up to a 35 nm thickness is perpendicular to the film surface and the basal lattice parameters are imposed by the cubic structure of the substrate. Furthermore, the emergence of a spontaneous electric polarization below similar to 32 K points to the stabilization of an improper ferroelectric phase at low temperatures, which is not observed in bulk GdMnO3. This work shows how strain engineering can be used to tailor the structure and properties of strongly correlated oxides.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8