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Related Concept Videos

Magnetostatic Boundary Conditions01:28

Magnetostatic Boundary Conditions

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An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
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Valence Bond Theory02:42

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Color in Coordination Complexes
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Related Experiment Video

Updated: Dec 31, 2025

Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates
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Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates

Published on: April 12, 2019

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Enhanced Magnetoelectric Coupling in BaTiO3-BiFeO3 Multilayers-An Interface Effect.

Stefan Hohenberger1, Johanna K Jochum2,3, Margriet J Van Bael2

  • 1Felix-Bloch-Institut für Festkörperphysik, Universität Leipzig, Linnéstraße 5, D-04103 Leipzig, Germany.

Materials (Basel, Switzerland)
|January 8, 2020
PubMed
Summary
This summary is machine-generated.

Multiferroic heterostructures enhance magnetoelectric coupling. BaTiO3-BiFeO3 multilayers show an interface-driven effect, boosting the magnetoelectric voltage coefficient (α ME) to a giant 480 V cm⁻¹ Oe⁻¹.

Keywords:
magnetoelectricmultiferroicoxide superlattices

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Multiferroic heterostructures offer enhanced properties compared to single-layer materials.
  • BiFeO3 (BFO) thin films exhibit magnetoelectric coupling, a key property for device applications.
  • Previous work showed a tenfold increase in magnetoelectric voltage coefficient (α ME) in BaTiO3-BiFeO3 multilayers.

Purpose of the Study:

  • To investigate the origin of enhanced magnetoelectric coupling in BaTiO3-BiFeO3 multilayers.
  • To evaluate the impact of multilayer design parameters on magnetoelectric properties.
  • To optimize heterostructures for advanced magnetoelectric devices.

Main Methods:

  • Fabrication of BaTiO3-BiFeO3 multilayer heterostructures with varying thickness ratios and periodicities.
  • Systematic variation of oxygen pressure during thin film deposition.
  • Characterization of structural and magnetoelectric properties.

Main Results:

  • An interface-driven effect significantly contributes to the enhanced magnetoelectric coupling.
  • The BaTiO3-BiFeO3 thickness ratio, oxygen pressure, and double layer thickness influence α ME.
  • A giant α ME of 480 V cm⁻¹ Oe⁻¹ was achieved in a 16 × (BaTiO3-BiFeO3) superlattice with 4.8 nm periodicity.

Conclusions:

  • The enhanced magnetoelectric coupling in BaTiO3-BiFeO3 multilayers is primarily driven by interfacial effects.
  • Precise control over multilayer design is crucial for maximizing magnetoelectric performance.
  • These findings pave the way for developing highly efficient magnetoelectric devices.