Local bias induced ferroelectricity in manganites with competing charge and orbital order states
authors Figueiras, FGN; Bdikin, IK; Amaral, VBS; Kholkin, AL
nationality International
journal PHYSICAL CHEMISTRY CHEMICAL PHYSICS
keywords MAGNETORESISTIVE MANGANITES; PHASE-TRANSITIONS; METAL; OXIDES
abstract Perovskite-type manganites, such as Pr1-xCaxMnO3, La1-xCaxMnO3 and La1-xSrxMnO3 solid solutions, are set forth as a case study of ferroelectricity formation mechanisms associated with the appearance of site- and bond- centered orbital ordering which breaks structural inversion symmetry. Even though the observation of macroscopic ferroelectricity may be hindered by the finite conductivity of manganites, polarization can still exist in nanoscale volumes. We use Piezoresponse Force Microscopy to probe local bias induced modifications of electrical and electromechanical properties at the manganite surface. Clear bias-induced piezocontrast and local hysteresis loops are observed for La0.89Sr0.11MnO3 and Pr0.60Ca0.40MnO3 compounds providing convincing evidence of the existence of locally induced polar states well above the transition temperature of the CO phase, while the reference samples without CO behavior show no ferroelectric-like response. Such coexistence of ferroelectricity and magnetism in manganites due to the charge ordering (CO) under locally applied electric field opens up a new pathway to expand the phase diagrams of such systems and to achieve spatially localized multiferroic effects with a potential to be used in a new generation of memory cells and data processing circuits.
publisher ROYAL SOC CHEMISTRY
issn 1463-9076
year published 2014
volume 16
issue 10
beginning page 4977
ending page 4981
digital object identifier (doi) 10.1039/c4cp00075g
web of science category Chemistry, Physical; Physics, Atomic, Molecular & Chemical
subject category Chemistry; Physics
unique article identifier WOS:000332393200059
link 24477353
  ciceco authors
  impact metrics
times cited (wos core): 7
journal impact factor (jcr 2016): 4.123
5 year journal impact factor (jcr 2016): 4.242
category normalized journal impact factor percentile (jcr 2016): 79.212
altmetrics:



 


Events
Sponsors

1suponsers_list_ciceco.jpg