Incipient ferroelectricity in 2.3% tensile-strained CaMnO3 films

Abstract

Epitaxial CaMnO3 films grown with 2.3% tensile strain on (001)-oriented LaAlO3 substrates are found to be incipiently ferroelectric below 25 K. Optical second harmonic generation (SHG) was used for the detection of the incipient polarization. The SHG analysis reveals that CaMnO3 crystallites with in-plane orientation of the orthorhombic b axis contribute to an electric polarization oriented along the orthorhombic a (resp.\ c) axis in agreement with the predictions from density functional calculations.

References in corpus (4)

• Restoring the density-gradient expansion for exchange in solids and surfaces
• Generalized gradient approximation for solids and their surfaces
• Spin-polarization coupling in multiferroic transition-metal oxides
• Engineering multiferroism in CaMnO${}_3$

Cited by in corpus (19)

• Strain controlled oxygen vacancy formation and ordering in CaMnO${}_3$
• Coupling and competition between ferroelectricity, magnetism, strain and oxygen vacancies in AMnO3 perovskites
• Strain effects on oxygen vacancy formation energy in perovskites
• Geometric Ferroelectricity in Fluoro-Perovskites
• Electric field control of Jahn-Teller distortions in bulk perovskites
• Electrical properties of improper ferroelectrics from first principles
• Strain engineering multiferroism in Pnma NaMnF3 fluoroperovskite
• Improper ferroelectricity and multiferroism in 2HBaMnO${}_3$
• Improper origin of polar displacements at CaTiO3 and CaMnO3 Twin Walls
• Interplay between strain, defect charge state and functionality in complex oxides
• Far infrared and terahertz spectroscopy of ferroelectric soft modes in thin films: A review
• Mechanisms and origin of multiferroicity
• Octahedral rotation patterns in strained EuFeO3 and other Pbnm perovskite films: Implications for hybrid improper ferroelectricity
• First-principles study of PbTiO${}_3$ under uniaxial strains and stresses
• Novel magneto-electric multiferroics from first-principles
• Preferential Orientation Relationships in Ca${}_2$MnO${}_4$ Ruddlesden-Popper thin films
• Surface- and strain-tuning of the optical dielectric function in epitaxially grown CaMnO3
• Emergent room-temperature ferroelectricity in spark-plasma sintered DyCrO${}_3$ and LaCrO${}_3$
• Interfacial reconstruction effects in insulating double perovskite Nd${}_2$NiMnO${}_6$/SrTiO${}_3$ and Nd${}_2$NiMnO${}_6$/NdGaO${}_3$ thin films