Max Planck研究人員發現一定程度、小於0.1奈米直徑的線性結晶晶格缺陷,會明顯的促成10奈米薄的鋯鈦酸鉛(lead zirconate titanate)孤立島塊(islands)喪失其記憶性質。此些缺陷形成於鈦酸鍶(strontium titanate)基材與島塊之間的介面。經由定量的高解析電子顯微鏡,發現稱之為不配對差排(misfit dislocations)的線性缺陷,會讓一條約4×8奈米矩形截面、20到50奈米長度的材料變形,而使得材料喪失其原有的儲存資料性質。如果鐵電材料島塊(ferroelectric island)過小,其大部分的體積都由一條條變形的材料所構成,鐵電材料則不再能儲存任何資料。如果奈米尺寸的鐵電氧化物要要使用於儲存資料,則必須設法避免晶格缺陷的形成。
Max Planck Institute of Microstructure Physics主任,Professor Ulrich Gösele評論,“不配對差排對半導體奈米結構光學與電學性質的擾亂影響早為所知,不過令人驚訝的是,此問題原來與鐵電奈米結構的儲存資料性質最為相關”,他認為此發現能為鐵電氧化物在微小化記憶元件的應用上,開啟一個新的可能性,能有系統的選擇定義明確的材料組合。
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