Electric-Field Control of Oxygen Vacancies and Magnetic Phase Transition in a Cobaltite/Manganite Bilayer

  title={Electric-Field Control of Oxygen Vacancies and Magnetic Phase Transition in a Cobaltite/Manganite Bilayer},
  author={Bai Cui and C. Song and F. Li and Xiaoyan Zhong and Z C Wang and P. Werner and Y. D. Gu and H. Wu and J. J. Peng and Muhammad Shahrukh Saleem and Stuart S. P. Parkin and Feng Pan},
  journal={Physical review applied},
  • B. Cui, C. Song, F. Pan
  • Published 17 October 2017
  • Materials Science
  • Physical review applied
Manipulation of oxygen vacancies (V_O) in single oxide layers by varying the electric field can result in significant modulation of the ground state. However, in many oxide multilayers with strong application potentials, e.g. ferroelectric tunnel junctions and solid-oxide fuel cells, understanding V_O behaviour in various layers under an applied electric field remains a challenge, owing to complex V_O transport between different layers. By sweeping the external voltage, a reversible… 
15 Citations

Tables from this paper

Oxygen-Valve Formed in Cobaltite-Based Heterostructures by Ionic Liquid and Ferroelectric Dual-Gating.
The ability to control the flow of oxygen ions across the heterointerface by the oxygen valve provides a new approach on the atomic scale for designing multistate memories, sensors, and solid-oxide fuel cells.
Emerging opportunities for voltage-driven magneto-ionic control in ferroic heterostructures
Voltage control of magnetism has been considered and proven to be an efficient actuation protocol to boost energy efficiency in a widespread range of spintronic devices. In particular, the study of
Doping- and Strain-Dependent Electrolyte-Gate-Induced Perovskite to Brownmillerite Transformation in Epitaxial La1-xSrxCoO3-δ Films.
The first study of ion-gel-gating-induced P → BM transformations across almost the entire La1-xSrxCoO3 phase diagram is presented, establishing that it is thermodynamic factors, not kinetics, that underpin the decrease in the threshold voltage with x, that is, with increasing formal Co valence.
Controlling properties of functional oxides by tuning oxygen defect chemistry
Oxygen defects are essential building blocks for properties and functionalities of oxides, including electrical conductivity, magnetism, ferroelectricity as well as catalytic and electrocatalytic
Electrolyte-gated magnetoelectric actuation: Phenomenology, materials, mechanisms, and prospective applications
Manipulation of the magnetic behavior of materials with voltage (i.e., magnetoelectric actuation) has become a topic of intense research during the last years. Apart from its obvious interest from a
Giant electrostatic modification of magnetism via electrolyte-gate-induced cluster percolation in La1−xSrxCoO3−δ
Electrical control of magnetism is a long-standing goal in science and technology, with the potential to enable a next generation of low-power memory and logic devices. Recently developed electrolyte
Role of interstitial hydrogen in SrCoO2.5 antiferromagnetic insulator
Hydrogen exhibits qualitatively different charge states depending on the host material, as nicely explained by the state-of-the-art impurity-state calculation. Motivated by a recent experiment
Evidence for exchange bias coupling at the perovskite/brownmillerite interface in spontaneously stabilized SrCoO3−δ/SrCoO2.5 bilayers
Interface effect in complex oxide thin film heterostructures lies at the vanguard of current research to design technologically relevant functionality and explore emergent physical phenomena. While


Suppression of Metal-Insulator Transition in VO2 by Electric Field–Induced Oxygen Vacancy Formation
It is found that electrolyte gating of epitaxial thin films of VO2 suppresses the metal-to-insulator transition and stabilizes the metallic phase to temperatures below 5 kelvin, even after the ionic liquid is completely removed.
Direct observation of ferroelectric field effect and vacancy-controlled screening at the BiFeO3/LaxSr1-xMnO3 interface.
An unexpected ~5% lattice expansion for regions with negative polarization charge is demonstrated, with a concurrent anomalous decrease of the Mn valence and change in oxygen K-edge intensity, which underline the non-trivial role of electrochemical phenomena in determining the functional properties of oxide interfaces.
Probing oxygen vacancy concentration and homogeneity in solid-oxide fuel-cell cathode materials on the subunit-cell level.
An approach for direct mapping of oxygen vacancy concentrations based on local lattice parameter measurements by scanning transmission electron microscopy is developed and the concept of chemical expansivity is demonstrated to be applicable on the subunit-cell level: local stoichiometry variations produce local lattices expansion that can be quantified.
Electric field control of the LaAlO3/SrTiO3 interface ground state
The electrostatic tuning of the carrier density allows an on/off switching of superconductivity and drives a quantum phase transition between a two-dimensional superconducting state and an insulating state, which opens the way to the development of new mesoscopicsuperconducting circuits.
Reversible Ferromagnetic Phase Transition in Electrode‐Gated Manganites
The electronic phase transition has been considered as a dominant factor in the phenomena of colossal magnetoresistance, metal‐insulator transition, and exchange bias in correlated electron systems.
Voltage-Controlled Topotactic Phase Transition in Thin-Film SrCoOx Monitored by In Situ X-ray Diffraction.
The results demonstrate the use of electrical bias to obtain fast and easily accessible switching between different phases as well as distinct physical and chemical properties of functional oxides as exemplified here for SCO.
Electric-field control of tri-state phase transformation with a selective dual-ion switch
It is shown that controlling the insertion and extraction of oxygen and hydrogen ions independently of each other can direct reversible phase transformations among three different material phases, opening up opportunities for the electric-field control of multistate phase transformations with rich functionalities.
Functional Ion Defects in Transition Metal Oxides
Dynamically tuning the concentration and profile of ions and vacancies in transition metal oxides provides a route to control of new functionalities that have led to the widespread use of oxides and may form the basis of new device paradigms, such as the control of magnetism with electric fields.
Formation and Migration of Oxygen Vacancies in SrCoO3 and Their Effect on Oxygen Evolution Reactions
Perovskite SrCoO3 is a potentially useful material for promoting the electrocatalytic oxygen evolution reaction, with high activities predicted theoretically and observed experimentally for closely
In operando evidence of deoxygenation in ionic liquid gating of YBa2Cu3O7-X
This work finds that the accumulated charge in the cuprate is due to the depletion of oxygen from specific sites in its unit cell, and shows that interfacing correlated oxides with ionic liquids enables a delicate control of oxygen content, paving the way to novel electrochemical concepts in future oxide electronics.