本論文主要是研究Pt/Fe雙層膜成長於MgO(001)單晶基板上後，經過退火處理其結構與磁性的變化，未退火前雙層膜僅具有水平磁異向性，透過退火處理可以使Pt/Fe雙層膜具有垂直磁異向性。藉由RHEED與XRD我們發現退火後雙層膜具有的FePt合金L10序化結構，是導致垂直磁異向性的主因，從MFM的分析中我們也發現磁域尺寸的變化是除了序化程度因素外，另一個影響矯頑場變化的原因。實驗中以雙層膜厚度與退火處理時間作為變化的參數，其中Pt(10Å)/Fe(10Å)的樣品在600℃退火處理1.5小時後的薄膜具有最大的矯頑場值，約10k Oe，且有理想的方正度(0.95)，是適合作為提升更高磁紀錄密度的良好材料。

The crystal structures and magnetic properties of Pt/Fe bi-
layers with annealing treatment have been investigated.The in-plane magnetization for the as-deposited Pt/Fe bilayers translates into the out of-plane magnetization after annealing treatment.The obvious RHEED and XRD feature for L10 ordered structurecue due to intermining process appears in the Pt/Fe bilayers for annealing .When annealing to 600℃ for 1.5 h,the Pt(10Å)/Fe(10Å) bi-layers exhibits a maximum coercivity(≈10K Oe) with square perpendicular magnetic hysteresis loop.The MFM images show magnetic domain size is reduced with decreasing thickness of bilayers,which in turn results in rising of the coercivity.

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