在MnGa纳米复合材料磁铁中的高磁性性能
Ovidiu Crisan1, Alina Daniela Crisan1
1National Institute for Materials Physics, P.O. Box MG-7, 077125 Magurele, Romania.
Nanomaterials (Basel, Switzerland)
|August 9, 2024
概括
研究人员探索了- (MnGa) 合金作为没有稀土的磁铁. 化这些合金产生了双L10和D022相,增强了强制场和和磁化等磁性特性.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 纳米技术纳米技术
背景情况:
- 对于高温应用而研究的纳米复合材料磁铁含稀土 (RE) 含量低或不含.
- 形成L10四边形相的磁二进制系统特别有希望.
- 基于的合金 (例如,Mn-Al,Mn-Bi,Mn-Ga,Mn-Ge) 提供了具有理想磁性特性的低成本替代品.
研究的目的:
- 为了研究MnGa二元合金,其组成围绕着Mn3Ga静态度.
- 分析MnGa合金在快速固化和回火后的结构阶段演变和磁性行为.
- 了解共存的L10和D022相对磁性质的影响.
主要方法:
- 通过快速固化生产四种MnGa磁合金 (70-75在% Mn).
- 使用X射线衍光度和传输电子显微镜进行结构性表征.
- 使用振动样本磁力测量的磁性测量.
主要成果:
- 分析了作为造合金的初始阶段形成.
- 在400°C和500°C的火过程中,产生了与L10和D022四角相同时存在的多相微观结构.
- 多相结构带来了增强的磁性,强制场和和磁化超过了MnGa合金和层的先前报告的值.
结论:
- 化过程有效地诱导MnGa合金中理想的L10和D022相的形成.
- 这些不同的四角形相的共存对于实现优越的磁性特征至关重要.
- 这些发现凸显了MnGa合金作为高性能无稀土永久磁铁的有希望的候选人.
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