Physics Letters A ( IF 2.3 ) Pub Date : 2021-06-29 , DOI: 10.1016/j.physleta.2021.127546 F.A. Pudonin , I.A. Sherstnev , D.D. Noskova , G.N. Eroshenko , D.A. Egorov , A.M. Shadrin
We study the permittivity (ε) of multilayer nanoisland systems [FeNi–Al2O3]N with different layer thicknesses using spectral ellipsometry. A “metallic” behavior of the permittivity () is found in structures with island FeNi layers, when there is a strong exchange interaction between the layers (dielectric layer thickness nm). When the exchange interaction in structures is strongly suppressed (Al2O3 layer's thickness nm), , which corresponds to the dielectric behavior of the permittivity. We conclude that the exchange interaction has a significant effect on the permittivity of structures. We also show that the dependences on the FeNi layer thickness for multilayer and single-layer structures are very close when the dielectric layer thickness nm.
中文翻译:
多层纳米岛系统的介电常数特征 [FeNi-Al 2 O 3 ] N
我们使用光谱椭偏法研究了具有不同层厚度的多层纳米岛系统 [FeNi-Al 2 O 3 ] N的介电常数 ( ε ) 。介电常数的“金属”行为() 存在于具有岛状 FeNi 层的结构中,当层之间存在强交换相互作用时(介电层厚度 纳米)。当结构中的交换相互作用被强烈抑制时(Al 2 O 3层的厚度 纳米), ,这对应于介电常数的介电行为。我们得出结论,交换相互作用对结构的介电常数有显着影响。我们还表明, 多层和单层结构对 FeNi 层厚度的依赖性非常接近时,介电层厚度 纳米。