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Structural dielectric and magnetic properties of (1-x)BiFeO3-xBa0.9Ca0.1Ti0.9Sn0.1O3 ceramics.

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Title: Structural dielectric and magnetic properties of (1-x)BiFeO3-xBa0.9Ca0.1Ti0.9Sn0.1O3 ceramics.
Authors: Mizouri, F.1 mizourifarhat@yahoo.fr, Kallel, I.1, Abdelmoula, N.1, Mezzane, D.2, Khemakhem, H.1
Source: Journal of Alloys & Compounds. Jan2018, Vol. 731, p458-464. 7p.
Subjects: Dielectric properties, Magnetic properties, Electric leakage, Dielectric measurements, Ceramics
Abstract: (1-x)BiFeO 3 -xBa 0.9 Ca 0.1 Ti 0.9 Sn 0.1 O 3 (0,1 < x ≤ 0,5) ceramics are synthesized by conventional solid-state reaction method. These ceramics are characterized by X-ray diffraction, Raman spectroscopy, dielectric and magnetic measurements. X-ray diffraction data refined via Reitveld method revealed that the crystal structure changes from biphasic structures ( R 3 c + Pnma ) for x = 0.1; x = 0.2 and x = 0.3 with different percentages to orthorhombic ( Pnma ) for x = 0.4 and x = 0.5, with (Ba 0.9 Ca 0.1 Ti 0.9 Sn 0.1 ) substitution. These results were confirmed by Raman spectroscopy analysis. Moreover, Ba 0.9 Ca 0.1 Ti 0.9 Sn 0.1 O 3 doped BiFeO 3 significantly reduces electric leakage and enhances dielectric properties. The obtained hysteresis loop (M-H) indicates that magnetization was enhanced and the maximum value of remnant magnetization occurred at x = 0.2 with M r = 0.163 emu/g. This can be explained by the suppression of the cycloid spin structure. A further increase in the substitution percentage beyond the sample x = 0.20 caused a large reduction in residual magnetization due to the dominant participation of collinear antiferromagnetic scheduling in the Pnma space group. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:(1-x)BiFeO 3 -xBa 0.9 Ca 0.1 Ti 0.9 Sn 0.1 O 3 (0,1 < x ≤ 0,5) ceramics are synthesized by conventional solid-state reaction method. These ceramics are characterized by X-ray diffraction, Raman spectroscopy, dielectric and magnetic measurements. X-ray diffraction data refined via Reitveld method revealed that the crystal structure changes from biphasic structures ( R 3 c + Pnma ) for x = 0.1; x = 0.2 and x = 0.3 with different percentages to orthorhombic ( Pnma ) for x = 0.4 and x = 0.5, with (Ba 0.9 Ca 0.1 Ti 0.9 Sn 0.1 ) substitution. These results were confirmed by Raman spectroscopy analysis. Moreover, Ba 0.9 Ca 0.1 Ti 0.9 Sn 0.1 O 3 doped BiFeO 3 significantly reduces electric leakage and enhances dielectric properties. The obtained hysteresis loop (M-H) indicates that magnetization was enhanced and the maximum value of remnant magnetization occurred at x = 0.2 with M r = 0.163 emu/g. This can be explained by the suppression of the cycloid spin structure. A further increase in the substitution percentage beyond the sample x = 0.20 caused a large reduction in residual magnetization due to the dominant participation of collinear antiferromagnetic scheduling in the Pnma space group. [ABSTRACT FROM AUTHOR]
ISSN:09258388
DOI:10.1016/j.jallcom.2017.10.066