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Browsing by Author "密修誌"

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    脈衝雷射蒸鍍法製備氧化釓鋅薄膜的探討: 結構、光學與磁性研究
    (2013) 密修誌
    我們是利用脈衝雷射沉積法製備摻雜釓的氧化鋅薄膜,X光繞射顯示樣品維持原有的晶體結構,但c軸晶格常數減小。因為薄膜的厚度在300nm以下,所以拉曼散射光譜只獲得微弱的訊號,樣品的能隙發光強度隨著摻雜濃度上升而下降,缺陷發光則隨釓濃度上升而增加,主要的缺陷有鋅錯位及鋅間隙,所有的樣品僅有Zn0.95Gd0.05O在室溫具有鐵磁性,其餘皆為順磁性。室溫(300K)的m-H曲線,只有x=0.051有磁滯曲線,在氧壓為3×10-1mbar及這樣的濃度下室溫是有鐵磁性。

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