钴引线之间超薄亚铁磁性层状纳米结构的子晶格磁化强度
Sublattice magnetizations of ultrathin ferrimagnetic lamellar nanostructures between cobalt leads
AI总结：
本文利用Ising自旋有效场理论与平均场理论相结合的方法，计算了钴引线之间Co-Gd超薄亚铁磁层状纳米结构各原子平面的子晶格磁化强度、有效磁矩及补偿特性，为后续磁振子输运和自旋电子学研究提供了必要的理论基础。
摘要：
在这项工作中，我们模拟了位于Co半无限引线之间的合金层状亚铁磁性纳米结构$[Co_{1-c}Gd_c]_{\ell^{\prime}}[Co]_\ell[Co_{1-c}Gd_c]_{\ell^{\prime}}$的显著磁学性质。我们采用Ising自旋有效场理论（EFT）计算了纯钴$J_{Co-Co}$和钆$J_{Gd-Gd}$材料的可靠磁交换常数，结果与它们的实验数据完全一致。通过结合EFT和平均场理论（MFT）的自旋方法，计算了Co-Gd层状纳米结构各个hcp原子（0001）平面上Co和Gd位点的子晶格磁化强度，并针对每个平面和相应位点进行了计算。对于嵌入纳米结构的各个hcp原子平面，计算了子晶格磁化强度、有效位点磁矩和亚铁磁补偿特性，作为温度的函数，并针对$c\leq 0.5$范围内的各种稳定共晶浓度进行了计算。这些位于钴引线之间的超薄亚铁磁性层状纳米结构系统的子晶格磁化强度和局域磁变量的理论结果，对于研究其磁振子输运性质以及最终的自旋电子学动力学计算是必要的。本工作发展的方法具有一般性，可应用于与其他材料构成纳米结构的可比磁性系统。
英文摘要：
In this work we model the salient magnetic properties of the alloy lamellar ferrimagnetic nanostructures $[Co_{1-c}Gd_c]_{\ell^{\prime}}[Co]_\ell[Co_{1-c}Gd_c]_{\ell^{\prime}}$ between $Co$ semi-infinite leads. We have employed the Ising spin effective field theory (EFT) to compute the reliable magnetic exchange constants for the pure cobalt $J_{Co-Co}$ and gadolinium $J_{Gd-Gd}$ materials, in complete agreement with their experimental data. The sublattice magnetizations of the $Co$ and $Gd$ sites on the individual hcp atomic (0001) planes of the $Co-Gd$ layered nanostructures are computed for each plane and corresponding sites, by using the combined EFT and mean field theory (MFT) spin methods. The sublattice magnetizations, effective site magnetic moments, and ferrimagnetic compensation characteristics for the individual hcp atomic planes of the embedded nanostructures, are computed as a function of temperature, and for various stable eutectic concentrations in the range $c\leq$ 0.5. The theoretical results for the sublattice magnetizations and the local magnetic variables of these ultrathin ferrimagnetic lamellar nanostructured systems, between cobalt leads, are necessary for the study of their magnonic transport properties, and eventually their spintronic dynamic computations. The method developed in this work is general and can be applied to comparable magnetic systems nanostructured with other materials.
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