Phase transition and enhanced magneto-dielectric response in BiFeO3-DyMnO3 multiferroics

Satya N. Tripathy; Dhiren K. Pradhan; Karuna K. Mishra; Shrabanee Sen; Ratnakar Palai; Marian Paulch; James F. Scott; Ram S. Katiyar; Dillip K. Pradhan

doi:10.1063/1.4916927

Phase transition and enhanced magneto-dielectric response in BiFeO₃-DyMnO₃ multiferroics

Satya N. Tripathy, Dhiren K. Pradhan, Karuna K. Mishra, Shrabanee Sen, Ratnakar Palai, Marian Paulch, James F. Scott, Ram S. Katiyar, Dillip K. Pradhan^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

We report systematic studies on crystal structure and magneto-dielectric properties of (1 − x) BiFeO₃-x DyMnO₃ (0.0 ≤ x ≤ 0.2) nanoceramics synthesized by auto-combustion method. Rietveld refinement of X-ray diffraction data indicates a structural transition from R3c to R3c + Pn2₁a at x = 0.1. Field emission scanning electron micrographs display a decrease in grain size with increase in x. The presence of dielectric anomalies around antiferromagnetic transition temperature implies the magnetoelectric coupling. Dielectric measurements showed decrease in magnetic ordering temperature with increasing x in agreement with differential scanning calorimetry results. A significant increase in magnetization has been found with increasing DyMnO₃ substitution. Magneto-impedance spectroscopy reveals a significant change (∼18%) in dielectricpermittivity at H = 2 T for x = 0.2.

Original language	English
Article number	144103
Number of pages	10
Journal	Journal of Applied Physics
Volume	117
Issue number	14
DOIs	https://doi.org/10.1063/1.4916927
Publication status	Published - 14 Apr 2015

Keywords

BiFeO3 nanoparticles
Ferroelectrics
Polarization
Boundary

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10.1063/1.4916927

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Cite this

@article{5186b8580d09485585998eac25903fee,

title = "Phase transition and enhanced magneto-dielectric response in BiFeO3-DyMnO3 multiferroics",

abstract = "We report systematic studies on crystal structure and magneto-dielectric properties of (1 − x) BiFeO3-x DyMnO3 (0.0 ≤ x ≤ 0.2) nanoceramics synthesized by auto-combustion method. Rietveld refinement of X-ray diffraction data indicates a structural transition from R3c to R3c + Pn21a at x = 0.1. Field emission scanning electron micrographs display a decrease in grain size with increase in x. The presence of dielectric anomalies around antiferromagnetic transition temperature implies the magnetoelectric coupling. Dielectric measurements showed decrease in magnetic ordering temperature with increasing x in agreement with differential scanning calorimetry results. A significant increase in magnetization has been found with increasing DyMnO3 substitution. Magneto-impedance spectroscopy reveals a significant change (∼18%) in dielectricpermittivity at H = 2 T for x = 0.2.",

keywords = "BiFeO3 nanoparticles, Ferroelectrics, Polarization, Boundary",

author = "Tripathy, {Satya N.} and Pradhan, {Dhiren K.} and Mishra, {Karuna K.} and Shrabanee Sen and Ratnakar Palai and Marian Paulch and Scott, {James F.} and Katiyar, {Ram S.} and Pradhan, {Dillip K.}",

note = "This work is partially supported by DST fast track Project No. SR/FTP/PS-16/2009. Dhiren K. Pradhan acknowledges IFN (NSF Grant No. EPS—01002410) for fellowship. The work at UPR was supported by National Science Foundation (NSF DMR 1410869) and Institute for Functional Nanomaterials (IFN).",

year = "2015",

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day = "14",

doi = "10.1063/1.4916927",

language = "English",

volume = "117",

journal = "Journal of Applied Physics",

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publisher = "American Institute of Physics",

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AU - Tripathy, Satya N.

AU - Pradhan, Dhiren K.

AU - Mishra, Karuna K.

AU - Sen, Shrabanee

AU - Palai, Ratnakar

AU - Paulch, Marian

AU - Scott, James F.

AU - Katiyar, Ram S.

AU - Pradhan, Dillip K.

N1 - This work is partially supported by DST fast track Project No. SR/FTP/PS-16/2009. Dhiren K. Pradhan acknowledges IFN (NSF Grant No. EPS—01002410) for fellowship. The work at UPR was supported by National Science Foundation (NSF DMR 1410869) and Institute for Functional Nanomaterials (IFN).

PY - 2015/4/14

Y1 - 2015/4/14

N2 - We report systematic studies on crystal structure and magneto-dielectric properties of (1 − x) BiFeO3-x DyMnO3 (0.0 ≤ x ≤ 0.2) nanoceramics synthesized by auto-combustion method. Rietveld refinement of X-ray diffraction data indicates a structural transition from R3c to R3c + Pn21a at x = 0.1. Field emission scanning electron micrographs display a decrease in grain size with increase in x. The presence of dielectric anomalies around antiferromagnetic transition temperature implies the magnetoelectric coupling. Dielectric measurements showed decrease in magnetic ordering temperature with increasing x in agreement with differential scanning calorimetry results. A significant increase in magnetization has been found with increasing DyMnO3 substitution. Magneto-impedance spectroscopy reveals a significant change (∼18%) in dielectricpermittivity at H = 2 T for x = 0.2.

AB - We report systematic studies on crystal structure and magneto-dielectric properties of (1 − x) BiFeO3-x DyMnO3 (0.0 ≤ x ≤ 0.2) nanoceramics synthesized by auto-combustion method. Rietveld refinement of X-ray diffraction data indicates a structural transition from R3c to R3c + Pn21a at x = 0.1. Field emission scanning electron micrographs display a decrease in grain size with increase in x. The presence of dielectric anomalies around antiferromagnetic transition temperature implies the magnetoelectric coupling. Dielectric measurements showed decrease in magnetic ordering temperature with increasing x in agreement with differential scanning calorimetry results. A significant increase in magnetization has been found with increasing DyMnO3 substitution. Magneto-impedance spectroscopy reveals a significant change (∼18%) in dielectricpermittivity at H = 2 T for x = 0.2.

KW - BiFeO3 nanoparticles

KW - Ferroelectrics

KW - Polarization

KW - Boundary

U2 - 10.1063/1.4916927

DO - 10.1063/1.4916927

M3 - Article

SN - 0021-8979

VL - 117

JO - Journal of Applied Physics

JF - Journal of Applied Physics

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ER -