Investigation of L1(0) FePt-based soft/hard composite bit-patterned media by micromagnetic simulation
Investigation of L1(0) FePt-based soft/hard composite bit-patterned media by micromagnetic simulation
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微磁模拟研究 L1(0) FePt 基软/硬复合位图介质
DOI：
10.1088/1674-1056/24/6/068504
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发表时间：
2015-04
影响因子：
1.7
通讯作者：
Wei Fu-Lin
中科院分区：
文献类型：
--
作者：
Wang Ying;Wei Dan;Cao Jiang-Wei;Wei Fu-Lin
软/硬复合图案化介质有可能成为下一代磁记录材料，但软/硬材料的组成模式还没有得到系统的研究。对具有各向异性常数分布的L10 FePt基软/硬复合图案化介质进行了微磁模拟研究。模拟了不同间距大小的正方形阵列和六边形阵列的两种组成类型：包裹硬点的软层和覆盖整个表面的软层。结果表明，对于所有的模型，软材料都能有效地减小BIT的开关场。与第一类模型相比，第二类模型由于引入了位间交换耦合，具有较低的开关场、较窄的开关场分布和较高的增益因子。此外，第二类型的读出波形不会被比特间软层劣化。由于六边形阵列的记录密度比相同中心距的正方形阵列的记录密度高，所以六边形阵列的读出波形略差一些，尽管这两个阵列的其他模拟结果相似。
The soft/hard composite patterned media have potential to be the next generation of magnetic recording, but the composing modes of soft and hard materials have not been investigated systematically. L10 FePt-based soft/hard composite patterned media with an anisotropic constant distribution are studied by micromagnetic simulation. Square arrays and hexagonal arrays with various pitch sizes are simulated for two composing types: the soft layer that encloses the hard dots and the soft layer that covers the whole surface. It is found that the soft material can reduce the switching fields of bits effectively for all models. Compared with the first type, the second type of models possess low switching fields, narrow switching field distributions, and high gain factors due to the introduction of inter-bit exchange coupling. Furthermore, the readout waveforms of the second type are not deteriorated by the inter-bit soft layers. Since the recording density of hexagonal arrays are higher than that of square arrays with the same center-to-center distances, the readout waveforms of hexagonal arrays are a little worse, although other simulation results are similar for these two arrays.
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影响因子：
2.1
作者：
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通讯作者：
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影响因子：
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影响因子：
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通讯作者：
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