Colossal Magnetoelectric Effect in Core-Shell Magnetoelectric Nanoparticles

Ping Wang, Elric Zhang, Dennis Toledo, Isadora Takako Smith, Brayan Navarrete, Nathaniel Furman, Alexandro Franco Hernandez, Mackenson Telusma, Dwayne McDaniel, Ping Liang, Sakhrat Khizroev

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Magnetoelectric coefficient values of above 5 and 2 V cm-1 Oe-1 in 20 nm CoFe2O4-BaTiO3 and NiFe2O4-BaTiO3 core-shell magnetoelectric nanoparticles were demonstrated. These colossal values, compared to 0.1 V cm-1 Oe-1 commonly reported for the 0-3 system, are attributed to (i) the heterostructural lattice-matched interface between the magnetostrictive core and the piezoelectric shell, confirmed through transmission electron microscopy, and (ii) in situ scanning tunneling microscopy nanoprobe-based ME characterization. The nanoprobe technique allows measurements of the ME effect at a single-nanoparticle level which avoids the charge leakage problem of traditional powder form measurements. The difference in the frequency dependence of the ME value between the two material systems is owed to the Ni-ferrite cores becoming superparamagnetic in the near-dc frequency range. The availability of novel nanostructures with colossal ME values promises to unlock many new applications ranging from energy-efficient information processing to nanomedicine and brain-machine interfaces.

Original languageEnglish (US)
Pages (from-to)5765-5772
Number of pages8
JournalNano Letters
Volume20
Issue number8
DOIs
StatePublished - Aug 12 2020

Keywords

  • Artificial Intelligence
  • Brain-Machine Interface
  • CoFeO-BaTiO
  • Colossal Magnetoelectric Effect
  • Core-Shell Magnetoelectric Nanostructures
  • NiFeO-BaTiO

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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