Effect of Fe doping in polycrystalline La0.7Sr0.3MnO3 on transport and magnetic properties
| dc.contributor.author | Araújo, José Humberto de | |
| dc.contributor.author | Xavier Júnior, M. M. | |
| dc.contributor.author | Cabral, F. A. O. | |
| dc.contributor.author | Feitosa, Carlos Chesman de Araújo | |
| dc.contributor.author | Dumelow, T. | |
| dc.contributor.author | Sasaki, José Marcos | |
| dc.date.accessioned | 2021-12-07T12:09:22Z | |
| dc.date.issued | 2001-05 | |
| dc.description.abstract | 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. | pt_BR |
| dc.description.embargo | 2031-12-12 | |
| dc.description.resumo | 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. | pt_BR |
| dc.identifier.citation | 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 | pt_BR |
| dc.identifier.doi | 10.1016/S0304-8853(01)00076-2 | |
| dc.identifier.uri | https://repositorio.ufrn.br/handle/123456789/45216 | |
| dc.language | en | pt_BR |
| dc.publisher | Elsevier | pt_BR |
| dc.subject | Rare earth-transition metal compounds | pt_BR |
| dc.subject | Magnetoresistance | pt_BR |
| dc.subject | Transport properties | pt_BR |
| dc.subject | Magnetic oxides | pt_BR |
| dc.title | Effect of Fe doping in polycrystalline La0.7Sr0.3MnO3 on transport and magnetic properties | pt_BR |
| dc.type | article | pt_BR |
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