本論文係由以多元醇還原法製備鐵鉑粒子，實驗中添加保護劑油酸及油胺，以製備出單分散性的粒子。在實驗中使用不同的還原劑，以及調整鐵與鉑前驅物的比例，探討FePt粒子在不同製備條件及不同溫度後續熱處理之後，其粒子型態及微結構的變化，以及對磁性質的影響。
實驗結果發現在不同製備條件下，可以得到不同型態的FePt粒子，在苯基醚溶劑中使用聚乙二醇當還原劑時，未經過熱處理的FePt粒子，為圓球狀的粒子；而利用乙二醇當溶劑及還原劑的FePt粒子，具有較不規則的形狀，其中有些粒子則是呈現方形且在局部排列成方形對稱。
由X-ray繞射圖得知，剛製備完成的FePt粒子為化學無序相的面心立方結構，經由熱處理後可以引發化學有序相面心正方結構的生成，有序相的生成與FePt粒子的成份組成有相當的關聯性，當Fe/Pt比例介於0.8-1.2之間，則會有較多的fct有序相生成，而較高的有序度下則會有較大的矯頑磁力值展現。

In this thesis, the synthesis of monodisperse iron-platium particles by modified polyol process in the presence of oleic acid and oleyl amine stabilizers is reported. The Fe and Pt composition of the particles can be tuned by adjusting the ratio of Fe(acac)3 to Pt(acac)2.
The FePt particles of different morphology can be synthesis under different condition. The FePt particles synthesis in phenyl ether are sphere shape. The cube shape FePt particles synthesized in ethylene glycol. The profiles of TEM grid indicate that the cube particles self-assemble on surface to form arrays with locally square symmetry.
As synthesized FePt nanoparticles possess disordered fcc structure. Thermal annealing induces the change of internal particle structure and thus the magnetic properties of the particles. Composition dependent structure shows that the annealed nanoparticles with composition ratio (Fe/Pt) around 0.8 to 1.2 will lead to highly ordered fct phase. In the range of the composition ratio, the particles also yield high coercivity.

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