Abstract

An increase in the anisotropy constant of the [CoFeB/SiO₂|Bi₂Te₃]₄₇ heterostructure under the influence of magnetic Fe/Fe₃O₄ nanoparticles deposited on the surface of the heterostructure to 20 wt % is detected by ferromagnetic resonance. It is established that a layer of Fe/Fe₃O₄ nanoparticles with a thickness of about 27 nm on a diamagnetic GaAs substrate has its own magnetic anisotropy caused by the magnetic dipole interaction between the particles. A layer of nanoparticles bound by magnetic dipole interaction forms the equivalent magnetic film, the stray field of which changes the effective magnetic anisotropy of the [CoFeB/SiO₂|Bi₂Te₃]₄₇ heterostructure.

中文翻译：

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[CoFeB/SiO2|Bi2Te3]47 多层异质结构在其表面沉积 Fe/Fe3O4 纳米颗粒时铁磁共振光谱和磁各向异性的变化

摘要

通过铁磁共振检测到在沉积在异质结构表面上的磁性Fe/Fe ₃ O ₄纳米颗粒的影响下，[CoFeB/SiO ₂ |Bi ₂ Te ₃ ] _{47异质结构的各向异性常数增加到20 wt%。}已确定在抗磁性GaAs衬底上的一层厚度约为27nm的Fe/Fe ₃ O ₄纳米颗粒具有由颗粒之间的磁偶极相互作用引起的自身的磁各向异性。一层由磁偶极子相互作用结合的纳米粒子形成等效磁膜，其杂散场改变了[CoFeB/SiO的有效磁各向异性₂ |Bi ₂ Te ₃ ] ₄₇异质结构。