Thermomagnetic writing in Tb‐Fe: Modeling and comparison with experiment
Thermomagnetic writing in Tb‐Fe: Modeling and comparison with experiment
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Tb-Fe 中的热磁写入：建模及与实验的比较
DOI：
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发表时间：
1988
期刊：
影响因子：
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通讯作者：
C. Lin
中科院分区：
文献类型：
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作者：
J. Suits;D. Rugar;C. Lin
给出了TbFe介质中热磁写入的计算机模型计算和实验比较。本文讨论了两种适用于观察到的两种类型的写作行为的模式。当壁面运动过程占主导，激光写入标记呈现单区行为时，“气泡”型写入模型给出了很好的实验一致性。该模型准确地解释了Tb0.23Fe0.77的写入行为。磁区壁能的梯度被发现是写入过程中的一个重要因素，并且可以导致成核延迟，直到发生一些冷却。这导致写入的磁区大小是所施加的偏置场的强函数。对于表现出多区域写入行为的组合物，我们发现“成核场”模型是合适的。该模型预测了观察到的标记尺寸与外加偏置场的弱相关性。此外，还利用成核场模型计算了与导通相对应的偏置场。
Computer model calculations and experimental comparison are presented for thermomagnetic writing in TbFe media. Two models are discussed which are appropriate for two observed types of writing behavior. A ‘‘bubble’’ type writing model is found to give good experimental agreement when wall motion processes dominate and the laser‐written marks exhibit single‐domain behavior. This model accurately accounts for the writing behavior of Tb0.23Fe0.77. The gradient of the domain‐wall energy is found to be an important factor in the writing process and can cause nucleation to be delayed until some cooling has occurred. This results in written domain sizes which are a strong function of the applied bias field. For compositions which exhibit multiple domain writing behavior, a ‘‘nucleation field’’ model is found to be appropriate. This model predicts the observed weak dependence of mark size on applied bias field. In addition, the nucleation field model is used to calculate the bias fields which correspond to the on...