Investigation of L10 FePt-based soft/hard composite bit-patterned media by micromagnetic simulation

doi:10.1088/1674-1056/24/6/068504

中国物理B ›› 2015, Vol. 24 ›› Issue (6): 68504-068504.doi: 10.1088/1674-1056/24/6/068504

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇下一篇

Investigation of L1₀ FePt-based soft/hard composite bit-patterned media by micromagnetic simulation

王颖^a, 韦丹^b, 曹江伟^a, 魏福林^a

a Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China;
b Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

收稿日期:2014-12-10 修回日期:2015-01-09 出版日期:2015-06-05 发布日期:2015-06-05
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 51171086 and 61272076) and the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 61003041).

Investigation of L1₀ FePt-based soft/hard composite bit-patterned media by micromagnetic simulation

Wang Ying (王颖)^a, Wei Dan (韦丹)^b, Cao Jiang-Wei (曹江伟)^a, Wei Fu-Lin (魏福林)^a

a Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China;
b Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

Received:2014-12-10 Revised:2015-01-09 Online:2015-06-05 Published:2015-06-05
Contact: Wang Ying E-mail:yingw@lzu.edu.cn
About author:85.70.Ay
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 51171086 and 61272076) and the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 61003041).

摘要/Abstract

摘要：

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.

关键词: micromagnetic simulation, composite bit patterned media, L1₀ FePt, switching field distribution, readout signal

Abstract:

Key words: micromagnetic simulation, composite bit patterned media, L1₀ FePt, switching field distribution, readout signal

中图分类号: (Magnetic device characterization, design, and modeling)

85.70.Ay

王颖, 韦丹, 曹江伟, 魏福林. Investigation of L1₀ FePt-based soft/hard composite bit-patterned media by micromagnetic simulation[J]. 中国物理B, 2015, 24(6): 68504-068504.

Wang Ying (王颖), Wei Dan (韦丹), Cao Jiang-Wei (曹江伟), Wei Fu-Lin (魏福林). Investigation of L1₀ FePt-based soft/hard composite bit-patterned media by micromagnetic simulation[J]. Chin. Phys. B, 2015, 24(6): 68504-068504.

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Investigation of L1₀ FePt-based soft/hard composite bit-patterned media by micromagnetic simulation

Investigation of L1₀ FePt-based soft/hard composite bit-patterned media by micromagnetic simulation

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