Evidence of ferroelectricity in metastable Sm2Ti2O7 thin film - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Materials Chemistry Année : 2012

Evidence of ferroelectricity in metastable Sm2Ti2O7 thin film

Résumé

The synthesis by the sol-gel route of metastable Sm 2Ti 2O 7 thin film is reported. While for standard conditions of pressure and temperature, the Sm 2Ti 2O 7 compound crystallizes in a cubic/pyrochlore structure, in the form of a thin film (grown on (110)-oriented SrTiO 3 substrate), a monoclinic/layered perovskite structure is stabilized by strain effects induced by the substrate. Under these conditions, (00l)-oriented Sm 2Ti 2O 7 oxide is isostructural to ferroelectric Ln 2Ti 2O 7 (with Ln = La, Ce, Pr and Nd) phases, which is already well known. Studies by Selected Area Electron Diffraction (SAED) reveal the existence of a systematically twinned structure and the presence of a fault in the stacking of the perovskite layers. Piezoresponse Force Microscopy (PFM) measurements confirm undoubtedly the ferroelectricity in this metastable phase.
Fichier non déposé

Dates et versions

hal-02269084 , version 1 (22-08-2019)

Identifiants

Citer

Zhenmian Shao, Sébastien Saitzek, Anthony Ferri, Mohamed Rguiti, Loïc Dupont, et al.. Evidence of ferroelectricity in metastable Sm2Ti2O7 thin film. Journal of Materials Chemistry, 2012, 22 (19), pp.9806. ⟨10.1039/c2jm16261j⟩. ⟨hal-02269084⟩
27 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More