论文标题
多晶兑换偏双层：磁性有效与结构性抗铁磁晶粒体积分布
Polycrystalline exchange-biased bilayers: magnetically effective vs. structural antiferromagnetic grain volume distribution
论文作者
论文摘要
多晶体交换偏置的抗fiferromagnet/Ferromagnet-bilayers的磁性特性取决于参数的复杂相互作用，这些相互作用描述了材料系统的结构和磁性特性，包括抗fiferromagnet的晶粒体积分布。这种系统的理想表征将是对每个晶粒的相关参数的无损确定。在大多数情况下，这是不可行的，因为典型的表征方法在较大的区域中确实是平均的。在这里，我们表明，与精心的模型相比，通过矢量性kerr磁力测定法测量的平均宏观磁量的平均显微镜参数可以确定平均显微镜参数。特别是，我们估计磁性有效的抗铁磁晶粒尺寸分布，对于与铁磁层的界面交换耦合至关重要。我们发现，磁性晶粒大小的分布与结构的分布不同，这表明与交换偏置相关的抗磁磁序仅在晶粒结构体积的一部分上扩展。
The magnetic characteristics of polycrystalline exchange-biased antiferromagnet/ferromagnet-bilayers are determined by a complex interplay of parameters, describing structural and magnetic properties of the material system, including in particular the grain volume distribution of the antiferromagnet. An ideal characterization of such systems would be a non-destructive determination of the relevant parameters for each individual grain. This is in most cases not feasible, since typical characterization methods do average over larger areas. Here, we show that it is however possible to determine averaged microscopic parameters from averaged macroscopic magnetic quantities measured by vectorial Kerr magnetometry in comparison to an elaborate model. In particular, we estimate the magnetically effective antiferromagnetic grain size distribution, being essential for the interface exchange coupling to the ferromagnetic layer. We found that the distribution of magnetically active grain sizes differs from the structural one, indicating that the antiferromagnetic order, relevant for the exchange bias, extends only over a part of the grains' structural volumes.
