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|Title:||Effect of oxygen nonstoichiometry on electrotransport and low-field magnetotransport property of polycrystalline La0.5Sr0.5MnO3-δ thin films|
|Citation:||Liu, J.-M., Huang, Q., Li, J., Ong, C.K., Wu, Z.C., Liu, Z.G., Du, Y.W. (2000-10-01). Effect of oxygen nonstoichiometry on electrotransport and low-field magnetotransport property of polycrystalline La0.5Sr0.5MnO3-δ thin films. Physical Review B - Condensed Matter and Materials Physics 62 (13) : 8976-8982. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevB.62.8976|
|Abstract:||Polycrystalline La0.5Sr0.5MnO3-δ thin films deposited on quartz wafers at 680°C and various oxygen pressures P by pulsed laser deposition are prepared. The effects of oxygen nonstoichiometry on the microstructural, electrotransport and low-field magnetotransport property of the thin films are investigated in details. A structural distortion from the stoichiometric lattice is identified for the samples deposited at P 0.1 mbar. Oxygen overdeficiency at P≤0.1 mbar essentially prohibits the spin reordering. The temperature dependence of the electro- and magnetotransport properties is explained by the two-channel model where the insulating channels and metallic ones coexist in parallel.|
|Source Title:||Physical Review B - Condensed Matter and Materials Physics|
|Appears in Collections:||Staff Publications|
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