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

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

doi:10.1016/j.jallcom.2018.11.170

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 journal › Article › peer-review

Abstract

Structural, dielectric, electric impedance and magnetic properties of TbMn_1-xCo_xO₃ and TbMn_1-xFe_xO₃ (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 language	English
Pages (from-to)	839-847
Number of pages	9
Journal	Journal of Alloys and Compounds
Volume	778
DOIs	https://doi.org/10.1016/j.jallcom.2018.11.170
State	Published - 25 Mar 2019
Externally published	Yes

Bibliographical note

Funding Information:
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.

Funding Information:
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.

Publisher Copyright:
© 2018

Keywords

Dielectric properties
Manganites
Nanoparticles

Access to Document

10.1016/j.jallcom.2018.11.170

Cite this

@article{d09338f670f04c3d95f29ccaff3907c8,

title = "Modified dielectric and magnetic properties of Fe and Co substituted TbMnO3 nanoparticles",

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.",

keywords = "Dielectric properties, Manganites, Nanoparticles",

author = "Anusree Das and Sayan De and Sudipta Bandyopadhyay and Souvik Chatterjee and Dipankar Das",

note = "Publisher Copyright: {\textcopyright} 2018",

year = "2019",

month = mar,

day = "25",

doi = "10.1016/j.jallcom.2018.11.170",

language = "אנגלית",

volume = "778",

pages = "839--847",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - Modified dielectric and magnetic properties of Fe and Co substituted TbMnO3 nanoparticles

AU - Das, Anusree

AU - De, Sayan

AU - Bandyopadhyay, Sudipta

AU - Chatterjee, Souvik

AU - Das, Dipankar

PY - 2019/3/25

Y1 - 2019/3/25

N2 - 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.

AB - 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.

KW - Dielectric properties

KW - Manganites

KW - Nanoparticles

UR - http://www.scopus.com/inward/record.url?scp=85056894245&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2018.11.170

DO - 10.1016/j.jallcom.2018.11.170

M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???

AN - SCOPUS:85056894245

SN - 0925-8388

VL - 778

SP - 839

EP - 847

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -