RT Journal Article
T1 Mapping chemical disorder and ferroelectric distortions in the double perovskite compound Sr2-xGdxMnTiO6 by atomic resolution electron microscopy and spectroscopy
A1 Biskup Zaja, Nevenko
A1 Álvarez Serrano, Inmaculada
A1 Veiga, María
A1 Rivera Calzada, Alberto Carlos
A1 Garcia Hernandez, Mar
A1 Pennycook, Stephen J.
A1 Varela Del Arco, María
AB In this work we report a study of the chemical and structural order of the double perovskite compound Sr2-xGdxMnTiO6 for compositions x = 0, 0.25, 0.5, 0.75, and 1. A noticeable disorder at the B-site in the Mn and Ti sublattice is detected at the atomic scale by electron energy-loss spectroscopy for all x values, resulting in Mn-rich and Ti-rich regions. For x >= 0.75, the cubic unit cell doubles and lowers its symmetry because of structural rearrangements associated with a giant ferroelectric displacement of the perovskite B-site cation. We discuss this finding in the light of the large electroresistance observed in Sr2-xGdxMnTiO6, x >= 0.75.
PB Oxford University Press
SN 1431-9276
YR 2014
FD 2014-04-01
LK https://hdl.handle.net/20.500.14352/105022
UL https://hdl.handle.net/20.500.14352/105022
LA eng
NO Biškup, N., Álvarez-Serrano, I., Veiga, M., Rivera-Calzada, A., Garcia-Hernandez, M., Pennycook, S. J. & Varela, M. (2014). Mapping Chemical Disorder and Ferroelectric Distortions in the Double Perovskite Compound Sr 2- x Gd x MnTiO 6 by Atomic Resolution Electron Microscopy and Spectroscopy. Microscopy and Microanalysis 20, 731–739
NO European Commission
NO Ministerio de Ciencia e Innovación (España)
NO Ministerio de Economia y Competitividad (España)
DS Docta Complutense
RD 6 abr 2025