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L10-FeNi films on Au-Cu-Ni buffer-layer: a high-throughput combinatorial study

机译:Au-Cu-Ni缓冲层上的L10-FeNi膜:高通量组合研究

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摘要

The fct L10-FeNi alloy is a promising candidate for the development of high performance critical-elements-free magnetic materials. Among the different materials, the Au-Cu-Ni alloy has resulted very promising; however, a detailed investigation of the effect of the buffer-layer composition on the formation of the hard FeNi phase is still missing. To accelerate the search of the best Au-Cu-Ni composition, a combinatorial approach based on High-Throughput (HT) experimental methods has been exploited in this paper. HT magnetic characterization methods revealed the presence of a hard magnetic phase with an out-of-plane easy-axis, whose coercivity increases from 0.49 kOe up to 1.30 kOe as the Au content of the Cu-Au-Ni buffer-layer decreases. Similarly, the out-of-plane magneto-crystalline anisotropy energy density increases from 0.12 to 0.35 MJ/m3. This anisotropy is attributed to the partial formation of the L10 FeNi phase induced by the buffer-layer. In the range of compositions we investigated, the buffer-layer structure does not change significantly and the modulation of the magnetic properties with the Au content in the combinatorial layer is mainly related to the different nature and extent of interlayer diffusion processes, which have a great impact on the formation and order degree of the L10 FeNi phase.
机译:fct L10-FeNi合金是开发高性能无关键元素磁性材料的有希望的候选者。在不同的材料中,Au-Cu-Ni合金的应用前景十分广阔。然而,仍然缺少关于缓冲层组合物对硬质FeNi相形成的影响的详细研究。为了加速寻找最佳的Au-Cu-Ni成分,本文采用了基于高通量(HT)实验方法的组合方法。 HT磁性表征方法揭示了存在一个具有平面外易轴的硬磁性相,随着Cu-Au-Ni缓冲层中Au含量的降低,其矫顽力从0.49 kOe升高到1.30 kOe。同样,面外磁晶各向异性能量密度从0.12 MJ / m 3 增加。该各向异性归因于由缓冲层引起的L10 FeNi相的部分形成。在我们研究的组成范围内,缓冲层结构没有明显变化,并且在组合层中随着Au含量的变化而引起的磁性能的调节主要与层间扩散过程的不同性质和程度有关,这具有很大的意义。对L10 FeNi相的形成和有序度的影响。

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