Effect of Fe doping in polycrystalline La0.7Sr0.3MnO3 on transport and magnetic properties

The effect of Fe doping (⩽10%) on polycrystalline samples of La0.7Sr0.3MnO3 has been studied through X-ray diffraction, resistivity, AC susceptibility, magnetization, and magnetoresistance measurements. Fe doping was found to change substantially the magnetic and transport properties of the samples,...

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Principais autores: Araújo, José Humberto de, Xavier Júnior, M. M., Cabral, F. A. O., Feitosa, Carlos Chesman de Araújo, Dumelow, T., Sasaki, José Marcos
Formato: article
Idioma:English
Publicado em: Elsevier
Assuntos:
Rare earth-transition metal compounds
Magnetoresistance
Transport properties
Magnetic oxides
Endereço do item:https://repositorio.ufrn.br/handle/123456789/45216
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spelling ri-123456789-452162024-03-19T04:06:35Z Effect of Fe doping in polycrystalline La0.7Sr0.3MnO3 on transport and magnetic properties Araújo, José Humberto de Xavier Júnior, M. M. Cabral, F. A. O. Feitosa, Carlos Chesman de Araújo Dumelow, T. Sasaki, José Marcos Rare earth-transition metal compounds Magnetoresistance Transport properties Magnetic oxides The effect of Fe doping (⩽10%) on polycrystalline samples of La0.7Sr0.3MnO3 has been studied through X-ray diffraction, resistivity, AC susceptibility, magnetization, and magnetoresistance measurements. Fe doping was found to change substantially the magnetic and transport properties of the samples, without modifying the lattice structure. In a magnetic field of 5 T, the magnetoresistance of a sample doped with 10% Fe was 4 times greater than that of an undoped sample, near the resistivity peak. This result was explained in terms of the formation of antiferromagnetic clusters of Fe ions. Magnetoresistance did not depend on Fe doping at 5 K, but there was a large magnetoresistive effect in fields less than 0.5 T in all samples. This behavior was attributed to spin polarized tunneling at grain boundaries of polycrystalline samples. The effect of Fe doping (⩽10%) on polycrystalline samples of La0.7Sr0.3MnO3 has been studied through X-ray diffraction, resistivity, AC susceptibility, magnetization, and magnetoresistance measurements. Fe doping was found to change substantially the magnetic and transport properties of the samples, without modifying the lattice structure. In a magnetic field of 5 T, the magnetoresistance of a sample doped with 10% Fe was 4 times greater than that of an undoped sample, near the resistivity peak. This result was explained in terms of the formation of antiferromagnetic clusters of Fe ions. Magnetoresistance did not depend on Fe doping at 5 K, but there was a large magnetoresistive effect in fields less than 0.5 T in all samples. This behavior was attributed to spin polarized tunneling at grain boundaries of polycrystalline samples. 2031-12-12 2021-12-07T12:09:22Z 2001-05 article XAVIER JUNIOR, M.M ; CABRAL, F.A.O ; ARAÚJO, José Humberto de ; CHESMAN, Carlos ; DUMELOW, T ; SASAKI, J.M . Effect of Fe doping in polycrystalline La0.7Sr0.3MnO3 on transport and magnetic properties. Journal of Magnetism and Magnetic Materials, v. 226-230, p. 826-828, 2001. Disponível em: https://www.sciencedirect.com/science/article/pii/S0304885301000762?via%3Dihub Acesso em: 28 mai 2020. DOI: https://doi.org/10.1016/S0304-8853(01)00076-2 https://repositorio.ufrn.br/handle/123456789/45216 10.1016/S0304-8853(01)00076-2 en application/pdf Elsevier
institution Repositório Institucional
collection RI - UFRN
language English
topic Rare earth-transition metal compounds
Magnetoresistance
Transport properties
Magnetic oxides
spellingShingle Rare earth-transition metal compounds
Magnetoresistance
Transport properties
Magnetic oxides
Araújo, José Humberto de
Xavier Júnior, M. M.
Cabral, F. A. O.
Feitosa, Carlos Chesman de Araújo
Dumelow, T.
Sasaki, José Marcos
Effect of Fe doping in polycrystalline La0.7Sr0.3MnO3 on transport and magnetic properties
description The effect of Fe doping (⩽10%) on polycrystalline samples of La0.7Sr0.3MnO3 has been studied through X-ray diffraction, resistivity, AC susceptibility, magnetization, and magnetoresistance measurements. Fe doping was found to change substantially the magnetic and transport properties of the samples, without modifying the lattice structure. In a magnetic field of 5 T, the magnetoresistance of a sample doped with 10% Fe was 4 times greater than that of an undoped sample, near the resistivity peak. This result was explained in terms of the formation of antiferromagnetic clusters of Fe ions. Magnetoresistance did not depend on Fe doping at 5 K, but there was a large magnetoresistive effect in fields less than 0.5 T in all samples. This behavior was attributed to spin polarized tunneling at grain boundaries of polycrystalline samples.
format article
author Araújo, José Humberto de
Xavier Júnior, M. M.
Cabral, F. A. O.
Feitosa, Carlos Chesman de Araújo
Dumelow, T.
Sasaki, José Marcos
author_facet Araújo, José Humberto de
Xavier Júnior, M. M.
Cabral, F. A. O.
Feitosa, Carlos Chesman de Araújo
Dumelow, T.
Sasaki, José Marcos
author_sort Araújo, José Humberto de
title Effect of Fe doping in polycrystalline La0.7Sr0.3MnO3 on transport and magnetic properties
title_short Effect of Fe doping in polycrystalline La0.7Sr0.3MnO3 on transport and magnetic properties
title_full Effect of Fe doping in polycrystalline La0.7Sr0.3MnO3 on transport and magnetic properties
title_fullStr Effect of Fe doping in polycrystalline La0.7Sr0.3MnO3 on transport and magnetic properties
title_full_unstemmed Effect of Fe doping in polycrystalline La0.7Sr0.3MnO3 on transport and magnetic properties
title_sort effect of fe doping in polycrystalline la0.7sr0.3mno3 on transport and magnetic properties
publisher Elsevier
publishDate 2021
url https://repositorio.ufrn.br/handle/123456789/45216
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