磁阻及高溫超導氧化物的奈米尺寸效應(3/3)

本計劃乃著重於研究氧化物材料的奈米尺 寸效應，期盼對奈米物理及奈米技術有所貢 獻。此計劃包含三個課題：(一)龐磁阻材料的 尺寸效應 ,(二)穿隧磁阻氧化物的尺寸效應, 以及（三）高溫超導氧化物的尺寸效應。計畫 執行自九一年八月至今年七月滿三年。到目前 為止，三個課題已有很好的進展，其後續工作 是將未發表之結果撰寫成論文。綜合論之，這 個計劃已有很豐盛的研究成果，期盼國科會能 繼續支持未來的計劃，以便能將我們的研究推 向卓越。茲將計劃中完成的成果逐一說明。In this project, we study the nano-size effects on various oxide materials, including textured La0.7Sr0.3MnO3 thin films, Nd0.5Ca0.38Sr0.12MnO3 bulk materials, and YBa2Cu3O7/La0.7Sr0.3MnO3 nano-granular bilayers. With changing their nano-structure, we investigate the various physical properties of these materials, such as structure, resistivity, magnetization and magnetoresistance. Many new findings have been obtained and all of them are related to the changes of electronic properties owing to the fine-tuning of local structures