The Effect of the Structural‐Phase State and Diffusion Processes on Electrical Conductivity of Nanocrystalline FexCo100−x/Cu/ FexCo100−x Thin Films (0 < x < 100),Crystal Research and Technology

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The Effect of the Structural‐Phase State and Diffusion Processes on Electrical Conductivity of Nanocrystalline FexCo100−x/Cu/ FexCo100−x Thin Films (0 < x < 100)
Crystal Research and Technology ( IF 1.5 ) Pub Date : 2020-08-05 , DOI: 10.1002/crat.202000071
Dmytro Saltykov ₁ , Natalia Shumakova ₁ , Iryna Pazukha ₁ , Yurii Shkurdoda ₁ , Serhii Protsenko ₁

Affiliation

The complex investigation of the crystal, diffusion processes, and electrical conductivity of Fe_xCo₁₀₀₋_x (0 < x < 100) film alloys and Fe_xCo₁₀₀₋_x/Cu/Fe_xCo₁₀₀₋_x/Sub three‐layer films with a ferromagnetic layer thickness d_F = 20–50 nm and a nonmagnetic layer thickness d_N = 2–30 nm has been carried out. For both as‐deposited and annealed at 700 K films at x = 50, 80 at%, the phase composition corresponds to bcc‐Fe_xCo₁₀₀₋_x (single‐layer films) or bcc‐Fe_xCo₁₀₀₋_x + fcc‐solid solution of Fe and Co atoms that isomorphically replace each other in the Cu lattice (three‐layer film). At x = 20 at%, the phase composition of as‐deposited single‐layer films corresponds to bcc‐Fe_xCo₁₀₀₋_x + hcp‐Co and bcc‐Fe_xCo₁₀₀₋_x + fcc‐Cu + hcp‐Co in the case of three‐layer films. After heat treatment at 700 K, the phase composition corresponds to bcc‐Fe_xCo₁₀₀₋_x + fcc‐Co (single‐layer films) and bcc‐Fe_xCo₁₀₀₋_x + fcc‐s.s. Cu (Fe, Co) (three‐layer film). For three‐layer samples with d_F = 30–50 nm, d_N = 10–30 nm, annealing at 700 K does not lead to complete mixing of the layers, their original order is preserved. In the temperature dependence of the resistivity, three characteristic regions, where the various electron scattering mechanisms dominate, are distinguished and grounded.

中文翻译：

结构相态和扩散过程对纳米晶FexCo100-x / Cu / FexCo100-x薄膜电导率的影响（0 <x <100）

Fe _x Co ₁₀₀₋_x（0 < x <100）薄膜合金和Fe _x Co ₁₀₀₋_x / Cu / Fe _x Co ₁₀₀₋_x / Sub三层的晶体，扩散过程和电导率的复杂研究已经完成了具有铁磁层厚度d _F = 20–50 nm和非磁性层厚度d _N = 2–30 nm的薄膜。对于x = 50、80 at％的700 K薄膜的沉积和退火，其相组成对应于bcc-Fe _x Co _100-_x（单层薄膜）或bcc-Fe_x Co₁₀₀₋_x + fcc-Fe和Co原子的固溶体，在Cu晶格中（三层膜）同构地相互替换。在x = 20 at％时，沉积的单层膜的相组成对应于bcc-Fe_x Co₁₀₀ -_x + hcp-Co和bcc-Fe_x Co₁₀₀ -_x + fcc-Cu + hcp-Co三层膜的情况。经过700 K热处理后，相组成对应于bcc-Fe_x Co₁₀₀ -_x + fcc-Co（单层膜）和bcc-Fe_x Co₁₀₀ -_x+ fcc-ss Cu（Fe，Co）（三层膜）。对于d _F = 30–50 nm，d _N = 10–30 nm的三层样品，在700 K下退火不会导致各层完全混合，它们的原始顺序得以保留。在电阻率的温度依赖性中，区分并接地了三个特征区域，其中各种电子散射机制占主导地位。

更新日期：2020-10-07

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