Enhanced low field magnetoresistance of Al2O3-La0.7Sr0.3MnO3 composite thin films via a pulsed laser deposition
作者： L. Yan , L. B. Kong , T. Yang , W. C. Goh , C. Y. Tan
DOI: 10.1063/1.1763237
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摘要: Al2O3-doped La0.7Sr0.3MnO3(Al2O3-LSMO) thin films were deposited on Si(111) substrate via a pulsed laser deposition. The Al2O3-LSMO composite characterized by x-ray diffraction, scanning electron microscopy, and electro- magneto-transport measurements. main phase in the was perovskite phase. Texturelike microstructure observed while average grain size remained almost unchanged compared to pure samples. metal-insulator transition temperature decreased as result of addition Al2O3 further reduced with increasing content. A maximum low field mangetoresistance ∼15% achieved 2∕20Al2O3-LSMO films, which could be well explained terms boundary tunneling effect. composition can easily tuned adjusting target composition. This method is believed applicable exploring combinations other manganite...
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