Effect of nitridation on magnetic properties of Fe53Pt47 thin film
Effect of nitridation on magnetic properties of Fe53Pt47 thin film
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氮化对Fe53Pt47薄膜磁性能的影响
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
T. Chin
中科院分区：
文献类型：
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作者：
H. Hsiao;R. Panda;J. Shih;T. Chin
具有不同厚度的Fe 53 Pt 47薄膜使用直流磁控溅射在各种衬底温度（即，从250至600 °C）施加到CrMo晶种玻璃基材上。 粉末X射线衍射研究表明，从衬底温度250 °C开始出现有序的fct γ2-FePt相。 估算的有序化参数表明，在300 °C下制备的薄膜具有良好的有序性，并且有序化参数随衬底温度的升高而缓慢增加。 在氮化的Fe 53 Pt 47薄膜，扩展的面心四面体晶格沿着c轴观察。饱和磁化强度随薄膜厚度的减小而减小。这主要是解释的基础上的尺寸和表面效应的纳米晶体在薄膜中，包括晶间相互作用。当薄膜厚度为350 nm时，薄膜的最大极化率为8.7 kOe。磁化强度随氮化时间的增加而急剧下降。
The Fe53Pt47 thin films with varying thickness were prepared using dc magnetron sputtering at various substrate temperatures (i.e., from 250 to 600 °C) on to CrMo seeded glass substrates. The powder x-ray diffraction studies reveal that the ordered fct γ2-FePt phase begins to appear starting from the substrate temperature of 250 °C. The estimated ordering parameters show that the films prepared at 300 °C are well ordered and ordering parameters increase slowly as increasing substrate temperatures. On nitridation of the Fe53Pt47 thin films, expansion of the face centered tetragonal crystal lattice along the c axis is observed. The saturation magnetization is decreased with decreasing film thickness. This has been explained mainly on the basis of size and surface effects of nanocrystals in the films including intergranular interactions. Maximum coercivity of 8.7 kOe is observed for the film thickness of 350 nm. The drastic decrease in magnetization with the increase in nitridation time duration has been att...