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Influence of PbZrO3 doping on the structural and magnetic properties of BiFeO3
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry, Structural Chemistry. (strukturkemi)
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry, Structural Chemistry. (strukturkemi)
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
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2008 (English)In: Solid State Sciences, ISSN 1293-2558, E-ISSN 1873-3085, Vol. 10, no 12, 1875-1885 p.Article in journal (Refereed) Published
Abstract [en]

Solid solutions of the perovskites (1 - x)BiFeO3-xPbZrO3 with x ranging from 0 to 0.2 were synthesized by solid-state reaction in an attempt to find magnetoelectric materials, in which ferroelectricity and ferromagnetism coexist. These complex perovskites have been studied by X-ray and neutron powder diffractions, magnetic and Mössbauer spectroscopic measurements. All samples are single phase with rhombohedrally distorted perovskite structure. The field and temperature dependences of the magnetization of (1 - x)BiFeO3-xPbZrO3 samples showed antiferromagnetic behavior with Neel temperatures, TN = 635 K (x = 0.1) and 500 K (x = 0.2); a weak ferromagnetic moment appeared at TN in both samples reaching about 0.01 μB/Fe at low temperature for the x = 0.1 sample. Mössbauer spectra also support the existence of the magnetic order and are consistent with the presence of high-spin Fe3+ cations located in the octahedral B-site position. Rietveld refinements of neutron powder diffraction data collected at different temperatures, between 10 and 700 K, have been carried out. The structure of these compounds is a rhombohedrally distorted perovskite (space group R3c) within the whole temperature interval. The Bi/Pb and Fe/Zr ions were found to be disordered over the perovskite A- and B-sites, respectively. Neutron diffraction patterns showed evidence of a long-range magnetic ordering below TN with a G-type antiferromagnetic arrangement of the magnetic moments of Fe3+ cations in the B-site. The effect of PbZrO3 doping on BiFeO3 results in a noticeable lattice expansion and a significant decrease of TN. The factors governing the observed structural and magnetic properties of (1 - x)BiFeO3-xPbZrO3 are discussed and compared with those of pure BiFeO3.

Place, publisher, year, edition, pages
2008. Vol. 10, no 12, 1875-1885 p.
Keyword [en]
Ceramics, Electronic materials, Neutron scattering, Crystal structure, Magnetic properties
National Category
Chemical Sciences Engineering and Technology
Research subject
Inorganic Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-106124DOI: 10.1016/j.solidstatesciences.2008.04.002ISI: 000262236800034OAI: oai:DiVA.org:uu-106124DiVA: diva2:223929
Available from: 2009-06-15 Created: 2009-06-15 Last updated: 2017-12-13

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Nordblad, Per

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