Low - field magneto - transport property of La Sr MnO thin 0 . 5 0 . 5 3 films deposited at low temperature by laser ablation
نویسندگان
چکیده
Ž . The low-field magneto-transport property of polycrystalline La Sr MnO LSMO thin films deposited on quartz 0.5 0.5 3 wafers by pulsed laser ablation at various temperatures is investigated. The film is of mixed amorphous and polycrystalline microstructure, depending on the depositing temperature. The low-field magneto-transport property of the thin films can be explained in terms of the two-channel model where the insulating channels and metallic channels coexist. Enhanced low-field magnetoresistance for the samples deposited from 5708C to 6008C in which nano-crystal phase is embedded in the amorphous matrix is demonstrated. q 2001 Elsevier Science B.V. All rights reserved. PACS: 75.50.Cn; 72.60.Tg; 73.50.Jt
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