Dielectric And Magnetic Characterization Of (La0.5-Xprxba0.5)(Mn0.5ti0.5)O3 Perovskite As A Multiferroic Material Synthesized Via Solid State Technique

A new manganate perovskite (La0.5-xPrxBa0.5)(Mn0.5Ti0.5)O3 has been prepared by ceramic solid-state technique at sintering temperature 1300 °C for 24 hours. The x concentration of Praseodymiun (Pr) in molar proportion in A site has been varied as x = 0, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 007, 0....

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Main Author: Alias, Nor Hayati
Format: Thesis
Language:English
English
Published: 2009
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Online Access:http://psasir.upm.edu.my/id/eprint/11970/1/FS_2009_37_A.pdf
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spelling my-upm-ir.119702013-05-27T07:50:31Z Dielectric And Magnetic Characterization Of (La0.5-Xprxba0.5)(Mn0.5ti0.5)O3 Perovskite As A Multiferroic Material Synthesized Via Solid State Technique 2009-10 Alias, Nor Hayati A new manganate perovskite (La0.5-xPrxBa0.5)(Mn0.5Ti0.5)O3 has been prepared by ceramic solid-state technique at sintering temperature 1300 °C for 24 hours. The x concentration of Praseodymiun (Pr) in molar proportion in A site has been varied as x = 0, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 007, 0.08, 0.09, 0.1, 0.2, 0.3 and 0.4. The dielectric properties of the synthesized materials have been studied at frequency ranging from 5 Hz to 1 MHz from room temperature up to 200 °C. Furthermore, analyses have been carried out to determine the structural, magnetic and dielectric electrical properties of the synthesized material as a candidate of multiferroic material. Pr (Praseodymium) addition would promote liquid phase sintering in the synthesized samples. This enhanced the agglomeration and porosity formation in the bulk volume. The defects and conducting liquid present would generate traps that produce negative permittivity response at interfacial/space charge frequency region due to delay in transient current or situation in which inertial conducting current of the trap presents, exceeding the charging-discharging current component. The XRD (X-Ray Diffractometry) results indicate all samples possess a single phase monoclinic structure with space group P112. Multiferroic magnetodielectric coupling in material with ferromagnetic and high dielectric constant ( > 30) is able to achieve in sampel with x molar concentration = 0.07 at room temperature. The dielectric value obtained is 176 with loss tan δ value 0.62. SEM/EDX analysis of the sample shows fine grain microstructure and high manganese (Mn) content ( > 0.6 wt %) which favours the double exchange mechanism. Perovskite Solids - Magnetic properties Dielectrics - Magnetic properties 2009-10 Thesis http://psasir.upm.edu.my/id/eprint/11970/ http://psasir.upm.edu.my/id/eprint/11970/1/FS_2009_37_A.pdf application/pdf en public masters Universiti Putra Malaysia Perovskite Solids - Magnetic properties Dielectrics - Magnetic properties Faculty Of Science English
institution Universiti Putra Malaysia
collection PSAS Institutional Repository
language English
English
topic Perovskite
Solids - Magnetic properties
Dielectrics - Magnetic properties
spellingShingle Perovskite
Solids - Magnetic properties
Dielectrics - Magnetic properties
Alias, Nor Hayati
Dielectric And Magnetic Characterization Of (La0.5-Xprxba0.5)(Mn0.5ti0.5)O3 Perovskite As A Multiferroic Material Synthesized Via Solid State Technique
description A new manganate perovskite (La0.5-xPrxBa0.5)(Mn0.5Ti0.5)O3 has been prepared by ceramic solid-state technique at sintering temperature 1300 °C for 24 hours. The x concentration of Praseodymiun (Pr) in molar proportion in A site has been varied as x = 0, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 007, 0.08, 0.09, 0.1, 0.2, 0.3 and 0.4. The dielectric properties of the synthesized materials have been studied at frequency ranging from 5 Hz to 1 MHz from room temperature up to 200 °C. Furthermore, analyses have been carried out to determine the structural, magnetic and dielectric electrical properties of the synthesized material as a candidate of multiferroic material. Pr (Praseodymium) addition would promote liquid phase sintering in the synthesized samples. This enhanced the agglomeration and porosity formation in the bulk volume. The defects and conducting liquid present would generate traps that produce negative permittivity response at interfacial/space charge frequency region due to delay in transient current or situation in which inertial conducting current of the trap presents, exceeding the charging-discharging current component. The XRD (X-Ray Diffractometry) results indicate all samples possess a single phase monoclinic structure with space group P112. Multiferroic magnetodielectric coupling in material with ferromagnetic and high dielectric constant ( > 30) is able to achieve in sampel with x molar concentration = 0.07 at room temperature. The dielectric value obtained is 176 with loss tan δ value 0.62. SEM/EDX analysis of the sample shows fine grain microstructure and high manganese (Mn) content ( > 0.6 wt %) which favours the double exchange mechanism.
format Thesis
qualification_level Master's degree
author Alias, Nor Hayati
author_facet Alias, Nor Hayati
author_sort Alias, Nor Hayati
title Dielectric And Magnetic Characterization Of (La0.5-Xprxba0.5)(Mn0.5ti0.5)O3 Perovskite As A Multiferroic Material Synthesized Via Solid State Technique
title_short Dielectric And Magnetic Characterization Of (La0.5-Xprxba0.5)(Mn0.5ti0.5)O3 Perovskite As A Multiferroic Material Synthesized Via Solid State Technique
title_full Dielectric And Magnetic Characterization Of (La0.5-Xprxba0.5)(Mn0.5ti0.5)O3 Perovskite As A Multiferroic Material Synthesized Via Solid State Technique
title_fullStr Dielectric And Magnetic Characterization Of (La0.5-Xprxba0.5)(Mn0.5ti0.5)O3 Perovskite As A Multiferroic Material Synthesized Via Solid State Technique
title_full_unstemmed Dielectric And Magnetic Characterization Of (La0.5-Xprxba0.5)(Mn0.5ti0.5)O3 Perovskite As A Multiferroic Material Synthesized Via Solid State Technique
title_sort dielectric and magnetic characterization of (la0.5-xprxba0.5)(mn0.5ti0.5)o3 perovskite as a multiferroic material synthesized via solid state technique
granting_institution Universiti Putra Malaysia
granting_department Faculty Of Science
publishDate 2009
url http://psasir.upm.edu.my/id/eprint/11970/1/FS_2009_37_A.pdf
_version_ 1747811286614278144