Enhancement of remanent polarization in epitaxial BaTiO3/SrTiO3 superlattices with “asymmetric” structure

Shimuta, Toru; Nakagawara, Osamu; Makino, Takahiro; Arai, Seiichi; Tabata, Hitoshi; Kawai, Tomoji

doi:10.1063/1.1434547

Cited by 191 publications

(142 citation statements)

References 11 publications

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“…[31][32][33][34] For subsequent simulations of defects in SrTiO 3 the volume as well as the shape of the cell are frozen. Defect calculations are performed using 2 × 2 × 2 (40 atoms) and 3 × 3 × 3 (135 atoms) simulation cells with 4 and 1 irreducible k-points, respectively, in the first Brillouin zone.…”

Section: Methods Of Calculationmentioning

confidence: 99%

Method for defect stability diagram fromab initiocalculations: A case study of SrTiO3

2012

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Point defects play a dominant role in determining the wide spectrum of electronic and physical properties of semiconducting materials that have vast technological applications. Using ab-initio simulations, a method to calculate equilibrium defect concentrations, Fermi energy and defect stability diagrams as functions of external parameters, such as temperature and pressure, is presented. Using SrTiO3 as a representative material, we report our analysis of the stability of oxygen vacancies and interstitials, in their different charge states, as a function of temperature, oxygen partial pressure and Fermi energy of the system. Further, by analyzing the defect chemistry at experimentally relevant temperatures, we find that at low oxygen partial pressure, neutral oxygen vacancies are most dominant and at intermediate and high oxygen partial pressure, doubly charged oxygen vacancies defects are dominant.

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Section: Methods Of Calculationmentioning

confidence: 99%

Method for defect stability diagram fromab initiocalculations: A case study of SrTiO3

2012

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“…14 But the discussion of the influence of interfacial coupling strain on the electric and magnetic properties in epitaxial PZT/CFO multilayer nanocomposite is rare, unlike the deeply studied ferroelectric/ferroelectric and ferroelectric/dielectric superlattice. 7,15 In this article, the epitaxial PZT, CFO pure film, and PZT/CFO multilayers were deposited in order to give the insight into the influence of perovskite/spinel interface and residual strain on the electric and magnetic properties. The comparison of electric and magnetic between single phase and multilayers with the same volume fraction was carried out and analyzed.…”

Section: Introductionmentioning

confidence: 99%

Interfacial engineering and coupling of electric and magnetic properties in Pb(Zr0.53Ti0.47)O3/CoFe2O4 multiferroic epitaxial multilayers

Zhang

Chan

2010

Journal of Applied Physics

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Epitaxial magnetoelectric ͑ME͒ Pb͑Zr 0.53 Ti 0.47 ͒O 3 ͑PZT͒ / CoFe 2 O 4 ͑CFO͒ multilayer nanocomposite thin films with up to 11 alternative layers are grown on Nb doped SrTiO 3 ͑STO͒ substrates by pulsed-laser deposition. X-ray diffraction and high resolution transmission electron microscopy studies reveal a good epitaxial relationship between the PZT and CFO layers without interfacial reaction at their interfaces. These epitaxial composite films exhibit strong ferroelectric and magnetic responses simultaneously at room temperature, and the interfacial-coupling-modulated dielectric behavior, polarization, and magnetic properties are observed and analyzed systematically. These results suggest that the magnetic, electric, and ME coupling effect may be tuned by the "strain engineering" in ferroelectric/magnetic or other multiferroic superlattice.

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“…As reported [9], the increase of the lattice parameter c is caused by the mismatch of the in-plane lattice parameters between BaT iO 3 /SrT iO 3 . Here we take J in > J b in order to ensure the enhancement of the polarization on the interface at a finite temperature.…”

Section: Resultsmentioning

confidence: 86%

The effects of a non-ferroelectric slab on the polarization and the susceptibility of a ferroelectric multilayer

Wu¹,

Yao²,

Dong³

et al. 2003

Solid State Communications

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The polarization and the susceptibility of a ferroelectric multilayer with a nonferroelectric slab are investigated within the framework of transverse Ising model with a four-spin interaction term. The effect of the thickness and the position of the non-ferroelectric slab are investigated in this paper. We find that the increase of the thickness of the non-ferroelectric will decrease the polarization and the susceptibility of the film. If the position of the non-ferroelcetric slab shifts from the center of the film to the surface, the number of the peaks of the susceptibility will change. And a step-like polarization curve is found.

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Enhancement of remanent polarization in epitaxial BaTiO3/SrTiO3 superlattices with “asymmetric” structure

Cited by 191 publications

References 11 publications

Method for defect stability diagram fromab initiocalculations: A case study of SrTiO3

Method for defect stability diagram fromab initiocalculations: A case study of SrTiO3

Interfacial engineering and coupling of electric and magnetic properties in Pb(Zr0.53Ti0.47)O3/CoFe2O4 multiferroic epitaxial multilayers

The effects of a non-ferroelectric slab on the polarization and the susceptibility of a ferroelectric multilayer

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