Investigation of anisotropy by ferromagnetic resonance (FMR) in exchange-coupled bilayer films
Investigation of anisotropy by ferromagnetic resonance (FMR) in exchange-coupled bilayer films
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DOI：
10.1109/tmag.1987.1065502
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发表时间：
1987-09
影响因子：
2.1
通讯作者：
A. Layadi;W. Cain;J. Lee;J. Artman
中科院分区：
文献类型：
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作者：
A. Layadi;W. Cain;J. Lee;J. Artman
我们利用铁磁共振（FMR）研究了双层交换耦合薄膜的磁各向异性。用我们的9和33 GHz FMR谱仪对NiFe/FeMn和NiFe/α-Fe 2 O3两个体系进行了实验。在某些NiFe/α-Fe 2 O3样品中，在33 GHz处检测到附加响应.我们将这种附加共振归因于NiFe和α-Fe 2 O3在它们的共同界面上相互扩散形成的区域。有效各向异性场，g值和相对体积已被确定为每个铁磁区域。对互扩散样品进行了俄歇剖面、透射电镜和会聚束电子衍射（CBED）截面分析，结果表明在NiFe和α-Fe 2 O3之间存在一层含Fe和Fe 3 O 4的层。在某些NiFe/α-Fe 2 O3样品中观察到了记忆效应，这可能是由于界面处不可逆的自旋重取向所致。
We have used ferromagnetic resonance (FMR) to investigate magnetic anisotropy in bilayer exchange-coupled thin films. Experiments, using both our 9 and 33 GHz FMR spectrometers, were done on two systems: NiFe/FeMn and NiFe/α-Fe 2 O 3 . In some of the NiFe/α-Fe 2 O 3 specimens an additional response was detected at 33 GHz. We attribute this additional resonance to a region formed by interdiffusion of NiFe and α-Fe 2 O 3 at their common interface. Effective anisotropy field, g-value and the relative volume have been determined for each ferromagnetic region. Auger profile, TEM and CBED (convergent beam electron diffraction) cross-section examinations were performed for an interdiffused specimen, the results are consistent with the presence of a layer containing Fe and Fe 3 O 4 located between the NiFe and α-Fe 2 O 3 regions. A memory effect, due presumably to irreversible spin reorientation at the interface, was observed in some of the NiFe/α-Fe 2 O 3 specimens.