Dynamic micromagnetic write head fields during magnetic recording in granular media
Dynamic micromagnetic write head fields during magnetic recording in granular media
复制标题
粒状介质磁记录期间的动态微磁写入头场
DOI：
10.1109/tmag.2004.832467
复制
发表时间：
2004
影响因子：
2.1
通讯作者：
M. Stehno
中科院分区：
文献类型：
--
作者：
T. Schrefl;M. Schabes;D. Suess;M. Stehno
以快速数据速率进行的磁记录需要在写入过程中具有磁通量快速上升时间的写头。我们提出了在颗粒介质中写入磁性比特期间整个环形磁头(包括3-D线圈几何形状)的三维微磁有限元计算。可获得的磁通上升时间的计算考虑了线圈中的电流上升、磁轭中的磁化过程、间隙附近极区中的磁化过程以及磁记录介质中的磁化动力学。模拟演示了在写入过程中，输入电流分布如何转化为磁头和介质中的磁化过程。
Magnetic recording at fast data rates requires write heads with rapid rise times of the magnetic flux during the write process. We present three-dimensional (3-D) micromagnetic finite-element (FEM) calculations of an entire ring head (including 3-D coil geometry) during the writing of magnetic bits in granular media. The calculation of the obtainable flux rise times takes into account the current rise in the coils, the magnetization processes in the yoke, the magnetization processes in the pole regions near the gap, as well as the magnetization dynamics in the magnetic recording media. The simulations demonstrate how input current profiles translate into magnetization processes in the head and media during writing.