Low-temperature ordering of L10-CoPt thin films promoted by Sn, Pb, Sb, and Bi additives
Low-temperature ordering of L10-CoPt thin films promoted by Sn, Pb, Sb, and Bi additives
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DOI：
10.1063/1.1346628
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发表时间：
2001-02-19
影响因子：
4
通讯作者：
Fukamichi, K
中科院分区：
文献类型：
--
作者：
Kitakami, O;Shimada, Y;Fukamichi, K
研究了Sn、Pb、Sb、Bi等元素对L1（0）-CoPt薄膜有序性的影响。所有这些添加剂被证明是非常有效的，以促进有序化和发展的一个非常大的结晶度的样品在400 degreesC退火。值得注意的是，该用于有序化的退火温度比纯CoPt的退火温度低200 ℃。晶体学和化学分析表明，这些添加剂很容易扩散和偏析到膜表面上的postannealing，因为它们的表面自由能非常低，在Co中的溶解度极低。因此，似乎可以合理地得出结论，在CoPt膜中的有序显着促进在更低的温度下，由postannealing排泄的添加剂产生的大量缺陷的援助。(C)2001年美国物理学会。
We have studied the effect of additional elements of Sn, Pb, Sb, and Bi on the ordering of L1(0)-CoPt films. All of these additives are demonstrated to be very effective to promote the ordering and developing of a very large coercivity of the samples annealed at 400 degreesC. It is worth noting that this annealing temperature for ordering is 200 degreesC lower than that of pure CoPt. The crystallographic and chemical analyses have revealed that these additives easily diffuse and segregate onto the film surfaces by postannealing because of their very low surface free energy and extremely low solubility in Co. Therefore, it seems reasonable to conclude that the ordering in the CoPt film is significantly promoted at much lower temperature by the aid of a lot of defects produced by the additives excreted by postannealing. (C) 2001 American Institute of Physics.