Evaporated Co/Pt layered structures for magneto-optical recording
Evaporated Co/Pt layered structures for magneto-optical recording
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用于磁光记录的蒸发Co/Pt层状结构
DOI：
10.1109/20.42426
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
P. Carcia
中科院分区：
文献类型：
--
作者：
W. B. Zeper;F. Greidanus;P. Carcia
本文讨论了用于磁光记录的薄（<500 AA）Co/Pt层状结构（LS）或多层膜的特性。这些LS具有垂直磁各向异性，其中一部分归因于界面各向异性贡献。Co层厚度为4 μ A或小于Pt层厚度为10-20 μ A的LS在λ =820 nm处具有100%的剩磁和-0.1度至-0.2度的克尔旋转θ/sub k/以及光反射率R= 70%。这些LS的居里温度在300到400摄氏度之间。作者还提出了第一个磁盘性能数据的钴/铂LS。用AlN和23*（3.5 AA Co+13 AA Pt）LS涂覆预开槽盘，并且尽管品质因数R θ/sup 2//sub k/没有完全优化，但实现了49 dB的载噪比。这一点，再加上优异的磁性能和高抗氧化性，使这些Co/Pt LS磁光记录非常有前途的候选人。此外，θ/sub k/在更短的波长处增加，其中更高的记录密度是可能的。< >
The authors discuss the properties of thin (<500 AA) Co/Pt layered structures (LSs) or multilayers for magnetooptical recording. These LSs have a perpendicular magnetic anisotropy, part of which is attributed to an interface anisotropy contribution. LSs with Co layer thicknesses of 4 AA or less than Pt layer thicknesses of 10-20 AA thick have a 100% magnetic remanence and a Kerr rotation, theta /sub k/, of -0.1 degrees to -0.2 degrees as well as optical reflectivity R=70%, both at lambda =820 nm. The Curie temperature of these LSs is between 300 and 400 degrees C. The authors also present the first disk performance data for Co/Pt LSs. A pregrooved disk was coated with AlN and a 23*(3.5 AA Co+13 AA Pt) LS, and, although the figure of merit R theta /sup 2//sub k/ was not fully optimized, a carrier/noise ratio of 49 dB was achieved. This, together with the excellent magnetic properties and high oxidation resistance, makes these Co/Pt LSs very promising candidates for magnetooptical recording. Furthermore, theta /sub k/ increases at shorter wavelengths where still higher recording densities are possible.< >