Magnetic orders of LaTiO${}_3$ under epitaxial strain: a first-principles study

Abstract

Perovskite LaTiO${}_3$ bulk is a typical Mott-insulator with G-type antiferromagnetic order. In this work, the biaxial strain effects on the ground magnetic order of LaTiO${}_3$ films grown on various substrates have been studied. For the compressive strain, LaTiO${}_3$ films grown on LaAlO${}_3$, LaGaO${}_3$, and SrTiO${}_3$ substrates undergo a phase transition from the original G-type antiferromagnet to A-type antiferromagnet. The underlying physical mechanisms are the lattice distortions tunned by strain. While for the tensile strain, the BaTiO${}_3$ and LaScO${}_3$ substrates have been tested, which show a tendency to transit the LaTiO${}_3$ to the C-type antiferromagnet. Furthermore, our calculations find that the magnetic transitions under epitaxial strain do not change the insulating fact of LaTiO${}_3$.

3 pages, 3 figures. Proceeding of the 58th MMM conference, accepted

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Cited by in corpus (5)

• (LaTiO${}_3$)${}_n$/(LaVO${}_3$)${}_n$ as a model system for unconventional charge transfer and polar metallicity
• Magnetism and electronic structure of ($001$)- and ($111$)-oriented LaTiO${}_3$ bilayers sandwiched in LaScO${}_3$ barriers
• Possible ferrimagnetism and ferroelectricity of half-substituted rare-earth titanate: a first-principles study on Y${}_{0.5}$La${}_{0.5}$TiO${}_3$
• Strain driven sequential magnetic transitions in strained GdTiO3 on compressive substrates: a first-principles study
• Orientation-dependent magnetism and orbital structure of strained YTiO${}_3$ films on LaAlO${}_3$ substrates