Room Temperature Electric-Field Control of Magnetism in Layered Oxides with Cation Order

Xue Zeng Lu, James M. Rondinelli*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Searching for materials with room-temperature electric-field control of magnetism has interested researchers for many years with three-dimensional perovskite BiFeO3-based compounds as the main focus. Here we choose the layered hybrid improper ferroelectric Ruddlesden-Popper oxides as a platform from which to realize electric field controllable magnetism, leveraging a recently identified strain tunable polar-to-nonpolar (P-NP) transition. We first propose a design principle for selecting the required A and B cation chemistries that will ensure (001) A3B2O7 films exhibit P-NP transitions, which we substantiate with density functional calculations. By extending the guideline to B-site ordered A3BB′O7 oxides, we identify more compounds exhibiting P-NP transitions marked by the disappearance of an in-plane polarization that can be functionalized. We then demonstrate that weak ferromagnetism can be tuned by an electric field at the boundary of the P-NP transition in B-site ordered (001) A3BB′O7 magnetic films, based on which we predict that cation ordered Ca3TcTiO7 may be a viable candidate for room-temperature electric-field control of magnetism.

Original languageEnglish (US)
Article number1604312
JournalAdvanced Functional Materials
Volume27
Issue number4
DOIs
StatePublished - Jan 26 2017

Keywords

  • density functional theory
  • ferroelectrics
  • multiferroics
  • phase transitions

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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