Modified dielectric and magnetic properties of Fe and Co substituted TbMnO3 nanoparticles

Anusree Das, Sayan De, Sudipta Bandyopadhyay, Souvik Chatterjee, Dipankar Das

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Structural, dielectric, electric impedance and magnetic properties of TbMn1-xCoxO3 and TbMn1-xFexO3 (x = 0.1 and 0.2) nanoparticles (NPs) prepared by the sol-gel method have been studied. Room temperature x-ray diffraction (XRD) patterns reveal formation of the pure crystalline orthorhombic phase. Transmission electron microscopic images of doped samples show particles with average size of 30 nm. Temperature dependent dielectric curves of all samples exhibit an increment of dielectric constant and loss with increase in doping concentration. Frequency dependent impedance spectra and Cole-Cole plots of all samples corroborate the presence of grain and grain boundary relaxations and their temperature dependence follow the Arrhenius relation. Temperature dependent magnetization curve of each sample exhibits antiferromagnetic ordering of both Tb and Mn moments. Magnetic hysteresis loops (at 5 K) of all samples show reduction in magnetization value in the doped samples. Conversely, coercivity is found to increase after Co and Fe doping.

Original languageEnglish
Pages (from-to)839-847
Number of pages9
JournalJournal of Alloys and Compounds
Volume778
DOIs
StatePublished - 25 Mar 2019
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2018

Funding

The author, Anusree Das thanks University Grants Commission (UGC), New Delhi, India, for providing Senior Research Fellowship. Authors acknowledge Department of Science and technology (DST), India (Project no. IR/S2/PU-06/2006), for low temperature high magnetic field facility at UGC-DAE Consortium for Scientific Research, Kolkata Centre, India. The author, Anusree Das thanks University Grants Commission ( UGC ), New Delhi, India, for providing Senior Research Fellowship. Authors acknowledge Department of Science and technology ( DST ), India (Project no. IR/S2/PU-06/2006 ), for low temperature high magnetic field facility at UGC-DAE Consortium for Scientific Research , Kolkata Centre, India.

FundersFunder number
Department of Science and Technology, Ministry of Science and Technology, India
University Grants Commission
University Grants Committee
Department of Science and Technology, Government of Kerala
University Grants Commission- Nepal
Department of Science and Technology, Government of RajasthanIR/S2/PU-06/2006
UGC-DAE Consortium for Scientific Research, University Grants Commission

    Keywords

    • Dielectric properties
    • Manganites
    • Nanoparticles

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