Strain-induced insulator state in La_0.7Sr_0.3CoO_3

Abstract

We report on the observation of a strain-induced insulator state in ferromagnetic La_0.7Sr_0.3CoO_3 films. Tensile strain above 1% is found to enhance the resistivity by several orders of magnitude. Reversible strain of 0.15% applied using a piezoelectric substrate triggers huge resistance modulations, including a change by a factor of 10 in the paramagnetic regime at 300 K. However, below the ferromagnetic ordering temperature, the magnetization data indicate weak dependence on strain for the spin state of the Co ions. We interpret the changes observed in the transport properties in terms of a strain-induced splitting of the Co e_g levels and reduced double exchange, combined with a percolation-type conduction in an electronic cluster state.

References in corpus (6)

• Colossal Magnetoresistant Materials: The Key Role of Phase Separation
• Influence of strain on magnetization and magnetoelectric effect in La0.7A0.3MnO3 / PMN-PT(001) (A = Sr; Ca)
• Evidence for orbital ordering in LaCoO3
• Structure, Magnetization and Resistivity of La${}_{1-x}$M${}_x$CoO${}_3$ (M = Ca, Sr, and Ba)
• Nano-magnetic droplets and implications to orbital ordering in La1-xSrxCoO3
• Pressure-induced insulating state in (La,Sr)CoO${}_3$

Cited by in corpus (21)

• Orbital reflectometry
• Non-volatile ferroelastic switching of the Verwey transition and resistivity of epitaxial Fe3O4/PMN-PT (011)
• Reversible strain effect on the magnetization of LaCoO3 films
• Engineering Correlation Effects via Artificially Designed Oxide Superlattices
• Reversible modulation of orbital occupations via an interface-induced state in metallic manganites
• High-temperature multiferroicity and strong magnetocrystalline anisotropy in 3d-5d double perovskites
• Phase transitions and ferroelectrics: revival and the future in the field
• Strain mediated suppression of the metal-insulator transition in EuNiO3 thin films
• Lattice structure and magnetization of LaCoO3 thin films
• Spin-state transition and spin-polaron physics in cobalt oxide perovskites: ab initio approach based on quantum chemical methods
• Strain induced metal-insulator transition in ultrathin films of SrRuO${}_3$
• Reversible shift in the superconducting transition for La1.85Sr0.15CuO4 and BaFe1.8Co0.2As2 using piezoelectric substrates
• Strain-induced tuning of the electronic Coulomb interaction in 3d transition metal oxide perovskites
• Giant reversible nanoscale piezoresistance at room temperature in Sr2IrO4 thin films
• Crafting the strain state in epitaxial thin films: A case study of CoFe2O4 films on Pb(Mg,Nb)O3-PbTiO3
• Strain-dependent resistance and giant gauge factor in monolayer WSe2
• Depth resolved chemical speciation of a superlattice structure
• Multi-Fields Modulation of Physical Properties of Oxide Thin Films
• Prediction of first-order martensitic transitions in strained epitaxial films
• Channelling study of La${}_{1-x}$Sr${}_x$CoO${}_3$ films on different substrates
• First-principles analysis of the effect of magnetic states on the oxygen vacancy formation energy in doped La${}_{0.5}$Sr${}_{0.5}$CoO${}_3$ perovskite