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Structural and Magnetic Properties of Pure and Mn-Doped Bismuth Ferrite Powders

Published online by Cambridge University Press:  23 January 2017

Hector A. Chinchay Espino ,
Gina M. Montes-Albino ,
Christian O. Villa Santos  and
Oscar J. Perales Perez
Hector A. Chinchay Espino*
Affiliation:
Department of Physics, University of Puerto Rico, Mayaguez Campus, Mayaguez, PR, United States.
Gina M. Montes-Albino
Affiliation:
Department of Mechanical Engineering, University of Puerto Rico, Mayaguez Campus, Mayaguez, PR, United States.
Christian O. Villa Santos
Affiliation:
Department of Chemical Engineering, University of Puerto Rico, Mayaguez Campus, Mayaguez, PR, United States.
Oscar J. Perales Perez
Affiliation:
Department of Engineering Sciences and Materials, University of Puerto Rico, Mayaguez Campus, Mayaguez, PR, United States.
*
*(Email: hector.chinchay@upr.edu)
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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.

Keywords

sol-gelmagnetic propertiesdopant
Type
Articles
Information
MRS Advances , Volume 2 , Issue 4: Electronics, Magnetics and Photonics , 2017 , pp. 253 - 258
Copyright
Copyright © Materials Research Society 2017 

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