首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Influence of Co layer thickness on the structural and magnetic properties of Pt/Co_(tCo))_3/Pt_(tpt)/IrMn multilayers
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Influence of Co layer thickness on the structural and magnetic properties of Pt/Co_(tCo))_3/Pt_(tpt)/IrMn multilayers

机译:Co层厚度对Pt / Co_(tCo))_ 3 / Pt_(tpt)/ IrMn多层膜的结构和磁性的影响

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摘要

The correlated effects of the insertion of a Pt spacer between ferromagnetic and antiferromagnetic layers and of the variation of the Co layers' thickness on the structural and magnetic properties of multilayers have been studied. Samples with n = 1 and 7, t_(Co) = 0.4 and 0.6 nm, t _(Pt) = 0 and 0.4 nm have been investigated by tomographic atom probe and superconducting quantum interference device magnetometry. For spacer-free samples (t_(Pt) = 0), the structural investigation shows that when t_(Co) = 0.4 nm, Mn and Ir atoms diffuse deeply into the (Pt/Co) _3 multilayers. In contrast for t_(Co) = 0.6 nm, the Mn and Ir diffusion is much reduced. Because Pt acts as a barrier against the Mn and Ir diffusion, this difference is less pronounced in samples with Pt insertion. The hysteresis loops shapes, the exchange bias fields and the saturation magnetization values were correlated with the structural properties of these samples and discussed, taking into account the susceptibility, exchange stiffness and perpendicular magnetic anisotropy.
机译:研究了在铁磁层和反铁磁层之间插入Pt隔离层以及Co层厚度变化对多层结构和磁性能的相关影响。通过层析X射线原子探针和超导量子干涉仪磁力计研究了n = 1和7,t_(Co)= 0.4和0.6 nm,t_(Pt)= 0和0.4 nm的样品。对于无间隔物的样品(t_(Pt)= 0),结构研究表明,当t_(Co)= 0.4 nm时,Mn和Ir原子深深地扩散到(Pt / Co)_3多层中。相反,对于t_(Co)= 0.6 nm,Mn和Ir的扩散大大减少了。由于Pt可以阻止Mn和Ir扩散,因此在插入Pt的样品中这种差异不太明显。考虑到磁化率,交换刚度和垂直磁各向异性,将磁滞回线的形状,交换偏置场和饱和磁化强度值与这些样品的结构特性相关联并进行了讨论。

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