Effect of magnetic field on the dielectric properties of multiferroic composites

Ravindar Tadi, Yong Il Kim, Kwon Sang Ryu, Cheol Gi Kim

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Magneto-dielectric materials are a subject of potential interests in terms of basics research and new device applications. In this study, 0. 5BaTiO 3-0. 5MgFe 2O 4 composites with ferroelectric and soft magnetic properties, synthesized using wet chemical methods, were investigated for the possibility of controlling the dielectric properties by application of a magnetic field. Composite pellets were thermally treated in air at 950 to 1150 °C for 3 h, and their structural, magnetic and magneticdielectric properties were characterized. All the composites showed soft magnetic properties. The magnetic field was applied to composite pellets in the order of 200 to 400 Oe, and a variation in the dielectric constant was observed. Significant findings, such as an increase in the dielectric constant with increasing of magnetic field, were observed in the composite pellets. The increase in the dielectric constant with respect to the applied magnetic field was depicted as being an effect of increased magnetostriction in the magnetic phase.

Original languageEnglish
Pages (from-to)1545-1549
Number of pages5
JournalJournal of the Korean Physical Society
Volume61
Issue number9
DOIs
StatePublished - Nov 2012

Bibliographical note

Funding Information:
This work was supported by the Korea Research Council of Fundamental Science and Technology (KRCF) through National Agenda Project.

Keywords

  • Magneto-dielectric
  • Magnetostriction
  • Multiferroic composite
  • Piezoelectric
  • Soft magnetic

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