Nanolamellar Magnetoelectric BaTiO3-CoFe2O4 Bicrystal

Abstract

Here, we report a spontaneously formed nanolamellar BaTiO3-CoFe2O4 bicrystal. (110) interfaces join the BaTiO3 and CoFe2O4 single crystalline periodically arranged lamellae that have a common [111] direction. The superlattice of approximately 2 nm wavelength is magnetoelectric with a frequency dependent coupling coefficient of 20 mV/Oe cm at 100 Hz. The BaTiO3 component is a ferroelectric relaxor with a Vogel-Fulcher temperature of 311 K. The relaxor behavior gives rise to a magnetic tunability of the relative dielectric constant <E (sub r)> to the -1 dE(sub r)/dH is approximately 10 to the -2. Since the material can be produced by standard ceramic processing methods, the discovery represents great potential for magnetoelectric devices.

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Document Details

Document Type
Technical Report
Publication Date
Oct 13, 2009
Accession Number
ADA589161

Entities

People

  • Manfred Wuttig
  • Mark Laver
  • Shenqiang Ren

Organizations

  • California Institute of Technology

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Chemistry
  • Crystals
  • Dielectric Permittivity
  • Diffraction
  • Electron Diffraction
  • Magnetic Fields
  • Materials
  • Materials Processing
  • Materials Science
  • Military Research
  • Nanoparticles
  • Nanostructures
  • Phase Separation
  • Physics
  • Standards
  • Transition Temperature
  • Two Dimensional

Fields of Study

  • Materials science

Readers

  • Aerospace Engineering
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.
  • Thermal Physics or Thermal Science.