Initial Permeability and Dynamic Response of FeCo Write Pole
Initial Permeability and Dynamic Response of FeCo Write Pole
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DOI：
10.1109/tmag.2010.2041906
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发表时间：
2010-05
影响因子：
2.1
通讯作者：
Sumei Wang;D. Wei;K. Gao
中科院分区：
文献类型：
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作者：
Sumei Wang;D. Wei;K. Gao
在这项工作中，微观结构和磁致伸缩效应的FeCo薄膜被认为是在微磁学模拟，因此，FeCo薄膜和写入极的磁性能可以更准确地计算。基于微磁学模型，计算了薄膜的磁滞回线。模拟结果表明，磁致伸缩效应对FeCo薄膜的矫顽力有很大的影响。此外，FeCo写极的初始磁导率和动态响应进行了研究。当写入极的易磁化轴沿着跨磁道方向时，宽128 nm、32 nm × 32 nm的ABS极尖在低频时的真实的初始磁导率为8.0，滚降频率为5.0 GHz。还研究了易磁化轴取向的影响。写入场约为4300 Oe，反转时间约为0.15 ns。通过一个简单的无微结构的微磁模型分析了磁导率的标度。
In this work, the microstructure and the magnetostriction effect of the FeCo thin film are considered in micromagnetic simulations; therefore the magnetic properties of the FeCo thin film and write pole can be calculated more accurately. Based on the micromagnetic models, magnetic hysteresis loops of films are calculated. The simulation results show that the magnetostriction has great effect on the coercive force of FeCo films. Furthermore, the initial permeability and the dynamic response of the FeCo write pole are studied. When the easy axis of the write pole is along cross-track direction, a 128 nm-wide and 32 nm × 32 nm-ABS pole tip has a real initial permeability of 8.0 at low frequencies and a roll-off frequency of 5.0 GHz. The effect of the easy axis orientation is also studied. The write field is about 4300 Oe with a reversal time of approximately 0.15 ns. The scaling of the permeability is analyzed by a simple micromagnetic model without microstructure.