Hydrothermal synthesis, characterization and composition-dependent magnetic properties of LaFe{sub 1-x}Cr{sub x}O{sub 3} system (0{<=}x{<=}1)

Hydrothermal synthesis, characterization and magnetic properties of a series of ABO{sub 3}-perovskites LaFe{sub 1-x}Cr{sub x}O{sub 3} (0{

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Published in:Journal of solid state chemistry 2010-07, Vol.183 (7)
Main Authors: Hu Weiwei, Chen Yan, Yuan Hongming, Zhang Ganghua, Li Guanghua, Pang Guangsheng, Feng Shouhua
Format: Article
Language:English
Subjects:
ANTIFERROMAGNETISM
CHALCOGENIDES
CHARGED PARTICLES
CHROMIUM COMPOUNDS
CHROMIUM IONS
FERROMAGNETISM
HYDROTHERMAL SYNTHESIS
INTERACTIONS
IONS
IRON COMPOUNDS
LANTHANUM COMPOUNDS
LATTICE PARAMETERS
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
MAGNETISM
MAGNETIZATION
MATERIALS SCIENCE
MINERALS
OXIDES
OXYGEN COMPOUNDS
PEROVSKITES
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SOLIDS
SYNTHESIS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
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container_issue 7
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container_title Journal of solid state chemistry
container_volume 183
creator Hu Weiwei
Chen Yan
Yuan Hongming
Zhang Ganghua
Li Guanghua
Pang Guangsheng
Feng Shouhua
description Hydrothermal synthesis, characterization and magnetic properties of a series of ABO{sub 3}-perovskites LaFe{sub 1-x}Cr{sub x}O{sub 3} (0{
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The alkalinity in initial reaction mixtures plays a critical role in controlling the designed stoichiometry of the final compositions. Their magnetic properties are strongly dependent on the compositions and a maximum magnetic moment is found for the sample at x=0.5. Weak ferromagnetic interaction observed for the samples from x=0 to 0.9 arises from the presence of Fe-O-Fe antisymmetric exchange and Fe-O-Cr superexchange interaction. The weak ferromagnetism as well as the linear variation of the lattice parameters implies the possible random distribution of Fe and Cr ions in B sites of the perovskites. The evolution of magnetic ordering transition temperatures has a close relationship with substituent ratios, for the competition of antiferromagnetism and ferromagnetism. The saturated magnetic moment shows a great improvement compared with that for the samples synthesized by solid state method. - Graphical abstract: A series of perovskites LaFe{sub 1-x}Cr{sub x}O{sub 3} (0{&lt;=}x{&lt;=}1) were synthesized by mild hydrothermal method and characterized by their weak ferromagnetism due to the possible random distribution of Fe and Cr ions in B sites of the perovskites. 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The alkalinity in initial reaction mixtures plays a critical role in controlling the designed stoichiometry of the final compositions. Their magnetic properties are strongly dependent on the compositions and a maximum magnetic moment is found for the sample at x=0.5. Weak ferromagnetic interaction observed for the samples from x=0 to 0.9 arises from the presence of Fe-O-Fe antisymmetric exchange and Fe-O-Cr superexchange interaction. The weak ferromagnetism as well as the linear variation of the lattice parameters implies the possible random distribution of Fe and Cr ions in B sites of the perovskites. The evolution of magnetic ordering transition temperatures has a close relationship with substituent ratios, for the competition of antiferromagnetism and ferromagnetism. The saturated magnetic moment shows a great improvement compared with that for the samples synthesized by solid state method. - Graphical abstract: A series of perovskites LaFe{sub 1-x}Cr{sub x}O{sub 3} (0{&lt;=}x{&lt;=}1) were synthesized by mild hydrothermal method and characterized by their weak ferromagnetism due to the possible random distribution of Fe and Cr ions in B sites of the perovskites. 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The alkalinity in initial reaction mixtures plays a critical role in controlling the designed stoichiometry of the final compositions. Their magnetic properties are strongly dependent on the compositions and a maximum magnetic moment is found for the sample at x=0.5. Weak ferromagnetic interaction observed for the samples from x=0 to 0.9 arises from the presence of Fe-O-Fe antisymmetric exchange and Fe-O-Cr superexchange interaction. The weak ferromagnetism as well as the linear variation of the lattice parameters implies the possible random distribution of Fe and Cr ions in B sites of the perovskites. The evolution of magnetic ordering transition temperatures has a close relationship with substituent ratios, for the competition of antiferromagnetism and ferromagnetism. The saturated magnetic moment shows a great improvement compared with that for the samples synthesized by solid state method. - Graphical abstract: A series of perovskites LaFe{sub 1-x}Cr{sub x}O{sub 3} (0{&lt;=}x{&lt;=}1) were synthesized by mild hydrothermal method and characterized by their weak ferromagnetism due to the possible random distribution of Fe and Cr ions in B sites of the perovskites. The magnetic property of the perovskites is strongly dependent upon the compositions and a maximum magnetic moment is found for LaFe{sub 1-x}Cr{sub x}O{sub 3} at x=0.5.</abstract><cop>United States</cop></addata></record>
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subjects ANTIFERROMAGNETISM
CHALCOGENIDES
CHARGED PARTICLES
CHROMIUM COMPOUNDS
CHROMIUM IONS
FERROMAGNETISM
HYDROTHERMAL SYNTHESIS
INTERACTIONS
IONS
IRON COMPOUNDS
LANTHANUM COMPOUNDS
LATTICE PARAMETERS
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
MAGNETISM
MAGNETIZATION
MATERIALS SCIENCE
MINERALS
OXIDES
OXYGEN COMPOUNDS
PEROVSKITES
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SOLIDS
SYNTHESIS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
title Hydrothermal synthesis, characterization and composition-dependent magnetic properties of LaFe{sub 1-x}Cr{sub x}O{sub 3} system (0{<=}x{<=}1)
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