Magnetic domains and demagnetizing fields in FeTb thin films
Magnetic domains and demagnetizing fields in FeTb thin films
复制标题
FeTb 薄膜中的磁畴和退磁场
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
H. Hoffmann
中科院分区：
文献类型：
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作者：
B. Lanchava;H. Hoffmann
500的磁性？实验研究了0.16 < x < 0.35的厚非晶薄膜。所有的薄膜都具有很强的垂直磁各向异性（PMA）和各向异性常数。使用极克尔显微镜，在样品中的磁畴图案与不同的组成参数x值进行了观察，揭示了强烈的磁畴形状和薄膜的磁参数之间的相关性。为了解释实验观察到的微磁畴生长的二维六边形网格模型的发展。采用周期边界条件下的FFT算法，对退磁场分布进行了较好的描述。该模型使我们能够计算的域模式和磁滞回线，与实验观察显示出良好的一致性。实验和理论研究都表明，接近补偿点是控制薄膜微磁行为的决定性因素。
The magnetic properties of 500 ? thick amorphous thin films with 0.16 < x < 0.35 have been studied experimentally. All films possess a strong perpendicular magnetic anisotropy (PMA) with an anisotropy constant . Using a polar Kerr microscope, the magnetic domain patterns in the samples with different values of the compositional parameter x were observed, revealing strong correlations between the domain shapes and the magnetic parameters of the films. In order to explain the experimental observations a micromagnetic model of domain growth on a two-dimensional hexagonal grid is developed. By means of an FFT algorithm with periodic boundary conditions an adequate description of the demagnetizing field distribution was achieved. The model allows us to calculate both the domain patterns and the hysteresis loops, showing good agreement with the experimental observations. Both the experimental and the theoretical studies demonstrate that the closeness to the compensation point is the decisive factor controlling the micromagnetic behaviour of the films.