通过铁基非晶合金中的磁异质纳米晶化机制实现高频超高磁导率,Advanced Materials

当前位置： X-MOL 学术 › Adv. Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

通过铁基非晶合金中的磁异质纳米晶化机制实现高频超高磁导率
Advanced Materials ( IF 27.4 ) Pub Date : 2023-08-10 , DOI: 10.1002/adma.202304490
Jing Zhou _{1,

2,

3} , Xuesong Li _{1,

4} , Xibei Hou ₁ , Haibo Ke ₁ , Xingdu Fan ₅ , Junhua Luan ₆ , Hailong Peng ₇ , Qiaoshi Zeng ₈ , Hongbo Lou ₈ , Jianguo Wang ₃ , Chain Tsuan Liu ₆ , Baolong Shen ₅ , Baoan Sun _{1,

2,

9} , Weihua Wang _{1,

2,

3,

4,

9} , Haiyang Bai _{1,

2,

9}

Affiliation

宽带隙 (WBG) 半导体的普及使得现代电子设备能够在更高的频率下运行。然而，开发具有与宽带隙器件相匹配的高频特性的软磁材料仍然具有挑战性。本文报道了一种有前途的纳米晶-非晶复合合金，其正常成分为 Fe _75.5 Co _0.5 Mo _0.5 Cu ₁ Nb _1.5 Si ₁₃ B ₈ （原子百分比），可在工业条件下生产，并且在高频下表现出极高的磁导率100 kHz 时高达 36 000，与商用 FeSiBCuNb 纳米晶合金（100 kHz 时 25 000 ± 2000）相比增加了 44%，优于所有现有的纳米晶合金体系和商用软磁材料。该合金是通过铁基非晶合金中独特的磁性非均质纳米晶化机制获得的，这不同于传统的通过掺杂非磁性元素（例如Cu和Nb）进行纳米晶化的策略。添加Co原子引起的局部磁不均匀性促进了作为纳米晶核的高度有序结构的形成，而Mo原子在纳米晶界面周围团聚，抑制了纳米晶的生长，从而在纳米晶中形成超细纳米晶-非晶双相结构。合金。优异的软磁性能与交变磁场下的低磁各向异性和独特的自旋旋转机制密切相关。

"点击查看英文标题和摘要"

Ultrahigh Permeability at High Frequencies via A Magnetic-Heterogeneous Nanocrystallization Mechanism in an Iron-Based Amorphous Alloy

The prevalence of wide-bandgap (WBG) semiconductors allows modern electronic devices to operate at much higher frequencies. However, development of soft magnetic materials with high-frequency properties matching the WBG-based devices remains challenging. Here, a promising nanocrystalline–amorphous composite alloy with a normal composition Fe_75.5Co_0.5Mo_0.5Cu₁Nb_1.5Si₁₃B₈ in atomic percent is reported, which is producible under industrial conditions, and which shows an exceptionally high permeability at high frequencies up to 36 000 at 100 kHz, an increase of 44% compared with commercial FeSiBCuNb nanocrystalline alloy (25 000 ± 2000 at 100 kHz), outperforming all existing nanocrystalline alloy systems and commercial soft magnetic materials. The alloy is obtained by a unique magnetic-heterogeneous nanocrystallization mechanism in an iron-based amorphous alloy, which is different from the traditional strategy of nanocrystallization by doping nonmagnetic elements (e.g., Cu and Nb). The induced magnetic inhomogeneity by adding Co atoms locally promotes the formation of highly ordered structures acting as the nuclei of nanocrystals, and Mo atoms agglomerate around the interfaces of the nanocrystals, inhibiting nanocrystal growth, resulting in an ultrafine nanocrystalline–amorphous dual-phase structure in the alloy. The exceptional soft magnetic properties are shown to be closely related to the low magnetic anisotropy and the unique spin rotation mechanism under alternating magnetic fields.

更新日期：2023-08-10

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南