Bulk amorphous alloys with soft and hard magnetic properties
Bulk amorphous alloys with soft and hard magnetic properties
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DOI：
10.1016/s0921-5093(97)80049-4
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发表时间：
1997-06
期刊：
影响因子：
6.4
通讯作者：
A. Inoue
中科院分区：
文献类型：
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作者：
A. Inoue
本文回顾了我们最近在室温下具有软磁性或硬磁性的大块非晶合金的发现。 Fe72Al5Ga2P11C6B4 和 Fe72Al5Ga2P10C6B4Si1 非晶合金具有软磁特性和大玻璃形成能力 (GFA)。通过铜模铸造形成的玻璃的最大厚度为约3mm。这些大块非晶合金在退火状态下的居里温度 (Tc) 为 600–606 K，其软磁性能饱和磁化强度 (Bs) 约为 1.1 T，矫顽力 (Hc) 约为 2–6 A m−1。厚度达 180 gmm 的厚非晶片在 1 kHz 时表现出 7000–12 000 的高磁导率。另一方面，直径小于15 mm的非晶态Ln60Fe30Al10(Ln=Nd或Pr)圆柱体获得了硬磁性能。 GFA 较大是由于 Tx/Tm 为 0.85-0.90，且 Tman 和 Tx 之间的温度间隔较小（85-140 K）。 Tcis 约为 600 K，典型磁特性为剩磁 0.13 T、Bs 0.15 T、Hcan 280 k A m−1 和 (JH)max 19 kJ m−3。硬磁特性在结晶状态下消失。铁磁块状非晶合金的首次成功合成对于未来基础科学和应用的进步具有重要意义。
This paper reviews our recent findings of bulk amorphous alloys with soft or hard magnetism at room temperature. Soft magnetic characteristics combined with large glass-forming ability (GFA) were obtained in Fe72Al5Ga2P11C6B4and Fe72Al5Ga2P10C6B4Si1amorphous alloys. The maximum thickness for glass formation by copper mold casting was about 3 mm. These bulk amorphous alloys have a Curie temperature (Tc) of 600–606 K in an annealed state and their soft magnetic properties are about 1.1 T for saturation magnetization (Bs) and 2–6 A m−1for coercive force (Hc). The thick amorphous sheets up to 180 gmm in thickness exhibit high permeability of 7000–12 000 at 1 kHz. On the other hand, the hard magnetic properties were obtained for amorphous Ln60Fe30Al10(Ln = Nd or Pr) cylinders with diameters below 15 mm. The large GFA is due to the high Tx/Tmof 0.85–0.90 and the small temperature intervals of 85–140 K between Tmand Tx. The Tcis around 600 K and typical magnetic properties are 0.13 T for remanence, 0.15 T for Bs, 280 k A m−1for Hcand 19 kJ m−3for (JH)max. The hard magnetic properties disappear in the crystallized state. The first success of synthesizing the ferromagnetic bulk amorphous alloys is important for future progress of basic science and applications.