Multiferroic behavior in composites of nickel-exchanged glass containing nanoparticles of barium titanate

R. Venkata Ram Naidu, Partha Hajra, Anindya Datta, Santanu Bhattacharya, Dipankar Chakravorty

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A multiferroic material has been synthesized by first growing BaTiO 3 nanocrystals in a silica glass and then subjecting the composite to a two-stage ion-exchange reaction of the type Ti4+↔2Ni 2+. The nanocomposite retained the usual ferroelectric characteristics with lower values of the dielectric constant and remanent polarization. It also showed ferromagnetic hysteresis at temperatures in the range 10-300 K. At temperatures below ∼10 K, the magnetization exhibited a sharp increase as the temperature was reduced. This has been explained on the basis of a one-dimensional Heisenberg ferromagnet consisting of Ni2+ ions at the surfaces of the nanocrystals. The nanocomposite showed magnetodielectric coupling at room temperature. The dielectric constant increased as a function of magnetic field, showing a maximum at 4 kOe. This has been ascribed to magnetostriction of the new BaTiO3 nanocrystalline phase.

Original languageEnglish (US)
Pages (from-to)3006-3011
Number of pages6
JournalJournal of the American Ceramic Society
Volume94
Issue number9
DOIs
StatePublished - Sep 2011

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Barium titanate
Nickel
Nanoparticles
Glass
Composite materials
Nanocrystals
Nanocomposites
Permittivity
Temperature
Magnetostriction
Remanence
Fused silica
Ferroelectric materials
Hysteresis
Magnetization
Ion exchange
Ions
Magnetic fields

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Multiferroic behavior in composites of nickel-exchanged glass containing nanoparticles of barium titanate. / Naidu, R. Venkata Ram; Hajra, Partha; Datta, Anindya; Bhattacharya, Santanu; Chakravorty, Dipankar.

In: Journal of the American Ceramic Society, Vol. 94, No. 9, 09.2011, p. 3006-3011.

Research output: Contribution to journalArticle

Naidu, R. Venkata Ram ; Hajra, Partha ; Datta, Anindya ; Bhattacharya, Santanu ; Chakravorty, Dipankar. / Multiferroic behavior in composites of nickel-exchanged glass containing nanoparticles of barium titanate. In: Journal of the American Ceramic Society. 2011 ; Vol. 94, No. 9. pp. 3006-3011.
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