Magnetocapacitance effect in ferromagnetic LiNbO3 nanoparticles

Carlos Díaz-Moreno, Jorge Lopez, Jesus González-Hernández, Roberto Escudero, Jesus L. Heiras, Miguel J. Yacamán, Juan Mendez-Nonell, Abel Hurtado-Macias

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Magnetocapacitance and magnetization behavior as a function of reduction heat treatment at 650 °C and 900 °C in a 5%H2-Ar atmosphere on LiNbO3 nanocrystalline are reported. There is a change of intrinsic dielectric constant (κ) from 822 to 860 produced by spin polarization using an external magnetic field. The Raman, X-ray photoelectron spectroscopy and electron paramagnetic resonance spectroscopy, indicate vibration mode changes localized at Nb-O bonds in the octahedron NbO6, shifts in the binding energy of the electronic structure of ions of niobium (3d) and the oxygen (1s). It is due to the oxygen vacancies caused by reduction heat treatment process. Moreover there is ions redistribution of Nb+3, Nb+4and Nb+5 at the surface of the nanoparticles.

Original languageEnglish (US)
Pages (from-to)291-298
Number of pages8
JournalJournal of Magnetism and Magnetic Materials
Volume407
DOIs
StatePublished - Jun 1 2016
Externally publishedYes

Keywords

  • Ferroelectric
  • Ferromagnetic
  • Lithium niobate
  • Magnetocapacitance
  • Multiferroic
  • Nanoparticles

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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