Micromagnetic analysis of L10 ordered FePt perpendicular recording media prepared by magnetron sputtering
Micromagnetic analysis of L10 ordered FePt perpendicular recording media prepared by magnetron sputtering
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DOI：
10.1063/1.2811849
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发表时间：
2007-12
影响因子：
3.2
通讯作者：
Zhenghua Li;Jiangwei Cao;F. Wei;K. Piao;S. She;D. Wei
中科院分区：
文献类型：
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作者：
Zhenghua Li;Jiangwei Cao;F. Wei;K. Piao;S. She;D. Wei
建立了FePt薄膜的三维微磁学模型，分析了FePt薄膜的磁性能与微结构之间的关系，详细讨论了薄膜的四轴对称性和磁致伸缩特性。结果表明，当面内磁弹性效应的残余拉应力为1Gpa时，纵向磁弹性环的垂直磁弹性和饱和磁场增大;四元各向异性（如面内闪烁与面外各向异性比为5：1的四元各向异性）增大纵向磁弹性，导致纵向磁弹性环和垂直磁弹性环尾部之间的张开.高垂直方形度是由c轴的完美取向和大的交换相互作用引起的。模拟的M-H环与实验结果吻合较好。
A three-dimensional micromagnetic model is built up to analyze the relationship between the magnetic property and the microstructure of FePt thin films, with careful discussions of the tetragonal symmetry and the magnetostriction. It is found that the in-plane magnetoelastic effect with a residual tensile stress on the order of 1Gpa would enlarge the perpendicular coercivity and the saturation field of the longitudinal loop; the tetragonal anisotropy, such as tetragonal anisotropy with 5:1 in-plane∕out-of-plane anisotropy ratio, tends to enlarge the longitudinal coercivity and conduce the open up between the tails of the longitudinal and perpendicular loops. The high perpendicular squareness is caused by the perfect orientation of the c axis and large exchange interactions. The simulated M‐H loops agree well with experiments.