High exchange bias field induced in ferrimagnetic bilayers of amorphous rare earth–transition-metal alloys
High exchange bias field induced in ferrimagnetic bilayers of amorphous rare earth–transition-metal alloys
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DOI：
10.1063/1.124340
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发表时间：
1999-07
影响因子：
4
通讯作者：
R. Sbiaa;H. Gall
中科院分区：
文献类型：
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作者：
R. Sbiaa;H. Gall
通过磁光法拉第旋转（FR）研究了交换耦合双层（ECDL）和相应单层稀土过渡金属的磁反转过程。 FR 对温度的依赖性表明，在单层补偿温度附近，DyFeCo/TbFeCo ECDL 从一种类型转变为另一种类型。小磁滞回线和大磁滞回线使我们能够测量 DyFeCo 引起的交换偏置场，这也已通过分析模型进行了计算。我们还观察到，在这种转变发生之前，会出现不寻常的磁滞回线几摄氏度。在这封信中，我们分析和描述了不同的磁化状态，并详细解释了各种磁化过程，包括常见和不寻常的FR环。
The magnetic reversal processes of exchange-coupled double layers (ECDL) and corresponding single layers of rare-earth–transition metal were studied by magneto-optical Faraday rotation (FR). The dependence of FR on the temperature shows a transition of DyFeCo/TbFeCo ECDL from one type to another near the compensation temperature of single layers. Minor and major hysteresis loops allowed us to measure the exchange bias field induced by DyFeCo, which has also been calculated with an analytical model. We have also observed that an unusual hystersis loop appears few celsius degrees before this transition occurs. In this letter, we analyze and describe different magnetization states, and various kinds of magnetization processes, including the usual and unusual FR loops, are explained in detail.