Title
Structural and magnetic properties of pure and Mn-doped bismuth ferrite powders
Date Issued
01 January 2017
Access level
metadata only access
Resource Type
conference paper
Author(s)
Chinchay Espino H.
Montes-Albino G.
Villa Santos C.
University of Puerto Rico
Publisher(s)
Materials Research Society
Abstract
Multiferroic materials are of great interest from the scientific and technological viewpoints based on their multifunctional behavior involving ferroelectricity, ferromagnetism, ferroelasticity and strong electromagnetic coupling properties. Among these materials, BiFeO3 (BFO), is a well-known multiferroic with simultaneous ferroelectricity (TC=1103K) and G-type antiferromagnetism (TN=643K). In this work, we doped BiFeO3 with Mn species and studied the doping effect on the corresponding magnetic properties, expected from the substitution of Bi3+ by Mn2+. Additionally, the optimum processing conditions to minimize the formation of any impurity phase were also identified. X-Ray Diffraction (XRD) characterization confirmed the formation of powdered impurity-free BFO in pure and 7 at.% Mn-BFO only after annealing of the precursor compounds at suitable temperatures and time (700°C, 15 minutes). Scanning Electron Microscopy (SEM) analyses were used to determine the size and morphology of synthetized powders. Vibrating sample magnetometry (VSM) measurements showed that maximum magnetization values increased with doping and reached a maximum value in the 7 at.% Mn-doped BFO annealed at 700°C for 15min; the corresponding magnetization in the non-saturated MH loops reached 0.68 emu/g. This behavior can be attributed to the actual incorporation of Mn species into the BFO lattice and the substitution of non-magnetic Bi species.
Start page
253
End page
258
Volume
2
Issue
4
Language
English
OCDE Knowledge area
Ingeniería de materiales
Scopus EID
2-s2.0-85041341891
Source
MRS Advances
ISSN of the container
20598521
Conference
MRS Advances
Sponsor(s)
This project was partially supported by the Institute for Functional Nanomaterials (NSF Grant 1002410) and the CREST Program (NSF Grant HRD 1345156). One of the authors (H. Ch.) also acknowledges the support from Mr. Carlex Morales with the characterization of the samples.
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