Effect of tungsten alloying on magnetic properties of amorphous Ni-P
Effect of tungsten alloying on magnetic properties of amorphous Ni-P
复制标题
钨合金化对非晶Ni-P磁性能的影响
DOI：
10.1016/j.jallcom.2019.01.109
复制
发表时间：
2019
影响因子：
6.2
通讯作者：
F. Ernst
中科院分区：
文献类型：
--
作者：
X. Zhan;M. Daniil;Xinyu Liu;M. Willard;R. Akolkar;F. Ernst
在近共晶非晶态 Ni-P 中添加少量钨可有效稳定所得非晶态 Ni-W-P 合金，防止结晶。暴露于热时，钨的存在会延迟铁磁相的结晶并降低总磁化强度。为了了解这种行为，分别通过 X 射线衍射和透射电子显微镜研究了热处理过程中的相形成以及伴随的微观结构变化。我们提出了一个模型来解释钨对磁性的影响。因此，钨减缓了形成结晶镍所需的扩散传输。此外，钨逐渐溶解到结晶镍中，降低其饱和磁化强度。这可以有重要的应用，例如。 g。对于硬盘盘片上的缓冲层，制造所需的热暴露不得在缓冲器中引起铁磁性，因为这会干扰顶部有源铁磁性薄膜中的信息存储。
Adding small fractions of tungsten to near-eutectic amorphous Ni–P effectively stabilizes the resulting amorphous Ni–W–P alloy against crystallization. On exposure to heat, the presence of tungsten retards the crystallization of ferromagnetic phases and decreases the total magnetization. To understand this behavior, phase formation during heat treatment and accompanying changes in the microstructure were studied by X-ray diffractometry and by transmission electron microscopy, respectively. We propose a model explaining the impact of tungsten on the magnetic properties. Accordingly, tungsten slows the diffusional transport required to form crystalline Ni. Moreover, tungsten gradually dissolves into the crystallized Ni, decreasing its saturation magnetization. This can have important applications e. g. for buffer layers on hard disk platters, where the heat exposure required by manufacturing must not induce ferromagnetism in the buffer as this would interfere with information storage in the active ferromagnetic film on top.