As recording heads become smaller to achieve higher recording densities, their domain structure increasingly influences their performance. Due to the presence of closure domains in the head, for track widths the order of 1 /spl mu/m, the available head flux becomes limited and the asymmetry in the flux geometry is increased. To study the problem, this paper presents some micromagnetic calculations on thin-film recording heads. The model computes the domain variations in the head when a field is applied for both permalloy and iron-nitride. It is found that the flux asymmetry is small for small fields, increases to a maximum, and finally disappears at saturation. Possible designs that could reduce this effect are discussed.
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机译：随着记录头变小以实现更高的记录密度，它们的域结构越来越多地影响其性能。由于磁头中存在闭合域，因此对于磁道宽度为1 / spl mu / m的量级，可用磁头磁通受到限制，磁通几何形状的不对称性增加。为了研究该问题，本文介绍了薄膜记录头上的一些微磁计算。当对坡莫合金和氮化铁都施加磁场时，该模型会计算头部的磁畴变化。发现对于小场，通量不对称性很小，增大到最大，最后在饱和时消失。讨论了可以减少这种影响的可能设计。
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