Interlayer coupling and magnetic reversal of antiferromagnetically coupled media
Interlayer coupling and magnetic reversal of antiferromagnetically coupled media
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DOI：
10.1063/1.1431397
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发表时间：
2002-01
影响因子：
4
通讯作者：
D. Margulies;M. Schabes;W. McChesney;E. Fullerton
中科院分区：
文献类型：
--
作者：
D. Margulies;M. Schabes;W. McChesney;E. Fullerton
我们描述了反铁磁耦合记录层的层间耦合和磁反转。我们表明，颗粒状结构和减少的下层厚度值导致其反转在室温下被强烈的热激活。我们还发现，层的粒状结构产生大的偶极场，有利于层的磁化反平行排列。这些偶极场克服了振荡耦合中的铁磁区域，作为Ru厚度tRu的函数，导致层间耦合仅在tRu>5 A时是反铁磁的。
We characterize the interlayer coupling and magnetic reversal of antiferromagnetically coupled recording layers. We show that the granular structure and reduced thickness values of the lower layer result in its reversal being strongly thermally activated at room temperature. We also find that the granular structure of the layers produces large dipolar fields which favor antiparallel alignment of the layer magnetizations. These dipolar fields overcome the ferromagnetic regions in the oscillatory coupling as a function of Ru thickness tRu, causing the interlayer coupling to be only antiferromagnetic for tRu>5 A.