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首页> 外文期刊>Journal of Superconductivity >Short-period GaMnAs/GaAs superlattices: optical and magnetic characterization
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Short-period GaMnAs/GaAs superlattices: optical and magnetic characterization

机译：短周期GaMnAs / GaAs超晶格：光学和磁性表征

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摘要

Superlattices with magnetic layers containing from 8 to 16 GaMnAs monolayers corresponding to the mixed crystal composition between 5 and 6% of Mn and from 4 to 10 GaAs monolayers were grown by the low temperature MBE technique and characterized by Raman scattering. Folded acoustic phonons were observed for all superlattices in the Raman scattering spectra. The interlayer exchange coupling, found previously by the wide-angle neutron diffraction in selected superlattices was investigated by the spin-polarized neutron reflectometry. It was always of ferromagnetic type, no trace of antiferromagnetic coupling was found.
机译：通过低温MBE技术生长具有磁性层的超晶格，该磁性层包含8至16个GaMnAs单层，对应于Mn的5至6％之间的混合晶体组成和4至10个GaAs单层，并通过拉曼散射进行表征。拉曼散射光谱中所有超晶格都观察到折叠的声子。通过自旋极化中子反射法研究了先前在选定的超晶格中通过广角中子衍射发现的层间交换耦合。它始终是铁磁类型的，没有发现反铁磁耦合的痕迹。

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