自從非晶形稀土-過渡(RE-TM)金屬薄膜，被發現具有垂直異向性後，成為最具有潛力的磁光紀錄薄膜，就開始受到廣泛的研究。由於RE-TM金屬薄膜具有兩個磁矩相反之磁區，因此在磁性多層膜交互作用力的探討上，就多了許多複雜及有趣的現象。本論文是在探討利用濺鍍製程製造之雙層磁光薄膜(TbFeCO、GdFeCo)，在加入一中間層(Cu)之後，產生了磁矩垂直膜面的巨磁阻(Giant magnetoresistance)現象，而且由調變磁性層之成份，可獲得室溫之反向巨磁阻(Inverse GMR)現象並研究磁阻隨著薄膜成分、厚度改變之影響。
此外，我們改變中間層的厚度，去研究其磁性質的變化，發現了TbFeCo及GdFeCo的矯頑場(Coercivity)具有隨著Cu厚度增加而震盪的情形，推測陶鐵磁薄膜由於Fe/Cu/Fe及Co/Cu/Co介面的存在，具有RKKY效應。在磁性薄膜的交互異向性方面，則由於陶鐵磁多層膜的交換場(Bias field)為正值，發現此作用力為一長距離之作用力，非一般所認為的必須在磁性層相接時才會有交換場之存在。

After rare-earth and transition-metal (RE-TM) thin films have been discovered to possess perpendicular anisotropy energy, it became the most popular candidate of magneto-optical recording media and appealed a lot of attention. Because RE-TM thin film has two opposite magnetic sub-lattices, we find many complex and interesting phenomenons.
This thesis discusses perpendicular giant magnetoresistance in the sandwich structure TbFeCo/Cu/GdFeCo. Then we changed the component of magnetic layer to obtain the inverse giant magnetoresistance at room temperature and observed the changes of MR ratio.

In addition, we altered the thickness of spacer to investigate the differences of magnetic properties. We discovered that the coercivity (Hc) of TbFeCo and GdFeCo oscillate with increasing the thickness of Cu. Due to this oscillation, we concluded that ferrimagnetic materials also behave RKKY effect. On the magnetic anisotropic exchange coupling, we found that the bias field of ferrimagnetic multilayers can be manipulated depending on the composition. If ferromagnetic layers were TM-TM, the bias field was negative. On the other hand, for RE-TM multilayers, the bias field become positive, which is quite different from ferromagnetic-antiferromagnetic coupling, and this can be explained by sublattice coupling.

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