Electrical and magneto-transport properties of La 0.8Sr 0.2MnO 3
The effects of sintering temperature on the electrical and magneto-transport properties of La 0.8Sr 0.2 MnO 3 compounds prepared by employing a chemical co-precipitation route sintered at 1120�C, 1220�C and 1320�C are reported. The X-ray powder diffraction patterns for all samples can be indexed to...
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my.uniten.dspace-305232023-12-29T15:48:53Z Electrical and magneto-transport properties of La 0.8Sr 0.2MnO 3 Shilan S.T. Ewe L.S. Abd-Shukor R. 55503171100 58032789200 7004750914 grain size magneto transport manganites Metal-insulator transition temperature The effects of sintering temperature on the electrical and magneto-transport properties of La 0.8Sr 0.2 MnO 3 compounds prepared by employing a chemical co-precipitation route sintered at 1120�C, 1220�C and 1320�C are reported. The X-ray powder diffraction patterns for all samples can be indexed to the rhombohedra structure with R3C space group. The insulator-metal transition temperature remained nearly constant (291 K) for all samples. The magneto resistance (MR) values were found to decrease noticeably as the sintering temperature was increased from 1120�C to 1320�C. Above 0.3 T, the magneto resistance was influenced by T o values, which indicates the bending of Mn-O-Mn bond. The resistivity data were fitted with several equations in the metallic (ferromagnetic) region. In the insulating (paramagnetic) region, the variable range hopping and small polaron hopping models were used to compute the density of states at the Fermi level, N(E F), and activation energy (E a) of the electrons. The resistivities can be fitted well with ?-T 2 and ?-T 2.5 curves. The variable range hopping model and small polaron hopping model fitted very well at high temperature regions, indicating that small polaron hopping might be responsible for the conduction. La 0.8 Sr 0.2MnO 3 sintered at 1220�C demonstrated the highest MR of 6.5% in 1 T magnetic field. � 2011 World Scientific Publishing Company. Final 2023-12-29T07:48:52Z 2023-12-29T07:48:52Z 2011 Article 10.1142/S0217979211102095 2-s2.0-84870062472 https://www.scopus.com/inward/record.uri?eid=2-s2.0-84870062472&doi=10.1142%2fS0217979211102095&partnerID=40&md5=2d228a4f10c04b3f5dda6332475fec68 https://irepository.uniten.edu.my/handle/123456789/30523 25 28 3825 3833 Scopus |
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grain size magneto transport manganites Metal-insulator transition temperature Shilan S.T. Ewe L.S. Abd-Shukor R. Electrical and magneto-transport properties of La 0.8Sr 0.2MnO 3 |
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The effects of sintering temperature on the electrical and magneto-transport properties of La 0.8Sr 0.2 MnO 3 compounds prepared by employing a chemical co-precipitation route sintered at 1120�C, 1220�C and 1320�C are reported. The X-ray powder diffraction patterns for all samples can be indexed to the rhombohedra structure with R3C space group. The insulator-metal transition temperature remained nearly constant (291 K) for all samples. The magneto resistance (MR) values were found to decrease noticeably as the sintering temperature was increased from 1120�C to 1320�C. Above 0.3 T, the magneto resistance was influenced by T o values, which indicates the bending of Mn-O-Mn bond. The resistivity data were fitted with several equations in the metallic (ferromagnetic) region. In the insulating (paramagnetic) region, the variable range hopping and small polaron hopping models were used to compute the density of states at the Fermi level, N(E F), and activation energy (E a) of the electrons. The resistivities can be fitted well with ?-T 2 and ?-T 2.5 curves. The variable range hopping model and small polaron hopping model fitted very well at high temperature regions, indicating that small polaron hopping might be responsible for the conduction. La 0.8 Sr 0.2MnO 3 sintered at 1220�C demonstrated the highest MR of 6.5% in 1 T magnetic field. � 2011 World Scientific Publishing Company. |
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55503171100 |
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55503171100 Shilan S.T. Ewe L.S. Abd-Shukor R. |
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Shilan S.T. Ewe L.S. Abd-Shukor R. |
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Shilan S.T. |
title |
Electrical and magneto-transport properties of La 0.8Sr 0.2MnO 3 |
title_short |
Electrical and magneto-transport properties of La 0.8Sr 0.2MnO 3 |
title_full |
Electrical and magneto-transport properties of La 0.8Sr 0.2MnO 3 |
title_fullStr |
Electrical and magneto-transport properties of La 0.8Sr 0.2MnO 3 |
title_full_unstemmed |
Electrical and magneto-transport properties of La 0.8Sr 0.2MnO 3 |
title_sort |
electrical and magneto-transport properties of la 0.8sr 0.2mno 3 |
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2023 |
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1806427398875381760 |
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13.18916 |