Magnetism and local structure in low-dimensional, Mott insulating GdTiO3

Abstract

Cation displacements, oxygen octahedral tilts, and magnetism of epitaxial, ferrimagnetic, insulating GdTiO3 films sandwiched between cubic SrTiO3 layers are studied using scanning transmission electron microscopy and magnetization measurements. With decreasing GdTiO3 film thickness, structural (GdFeO3-type) distortions are reduced, concomitant with a reduction in the Curie temperature. Ferromagnetism persists to smaller deviations from the cubic perovskite structure than is the case for the bulk rare earth titanates. The results indicate that the FM ground state is controlled by the narrow bandwidth, exchange and orbital ordering, and only to second order depends on amount of the GdFeO3-type distortion.

Submitted to Physical Review B (Rapid Communication)

References in corpus (4)

• Orbital Physics in the Perovskite Ti Oxides
• Magnetoelastic coupling in RETiO3 (RE = La, Nd, Sm, Gd, Y)
• Structural origins of the properties of rare earth nickelate superlattices
• Nanoscale Quantification of Octahedral Tilts in Perovskite Films

Cited by in corpus (7)

• A Deep Convolutional Neural Network to Analyze Position Averaged Convergent Beam Electron Diffraction Patterns
• Correlation between metal-insulator transitions and structural distortions in high-electron-density SrTiO3 quantum wells
• Interface-driven ferromagnetism within the quantum wells of a rare earth titanate superlattice
• Magneto-Elastic Coupling to Coherent Acoustic Phonon Modes in Ferrimagnetic Insulator GdTiO${}_3$
• Response of the lattice across the filling-controlled Mott metal-insulator transition of a rare earth titanate
• The Future of the Correlated Electron Problem
• Octahedral tilt independent magnetism in confined GdTiO${}_3$ films