摘要
在后摩尔时代,随着集成变压器及电感的广泛应用,迫切需要软磁材料在兆赫兹频段拥有稳定的磁导率.然而,传统恒导磁软磁铁氧体存在饱和磁化强度低和温度不稳定等问题,不适合应用于集成电路.铁基纳米晶合金因其独特的非晶-纳米晶双相磁耦合结构表现出优异的综合软磁性能,在新能源汽车和5G通信等新兴电力电子领域中已展示出巨大潜力.本文采用连续张应力热处理法,获得在宽频范围内(1 kHz-10 MHz)稳定磁导率为~400的Fe73.5Si15.5B7Nb3Cu1纳米晶合金.该合金经连续张应力热处理后,其感生磁各向异性能达2503 J/m^(3),磁畴呈窄条状横向排列且尺寸趋于一致.该工作为恒导磁软磁材料的制备提供了一种新思路,有望弥补软磁材料在现代电子设备应用中的不足.
Soft magnetic materials,playing an important role in integrated transformers and inductors,are crucial in the more-than-Moore era,which contain stable permeability over megahertz(MHz).However,traditional frequency-stable soft magnetic ferrites are unsuitable for integrated circuits due to their low saturation magnetization and temperature instability.Fe-based nanocrystalline alloys exhibit excellent soft-magnetic properties containing the unique nanocrystalline-amorphous dual-phase structure,which shows great potential in strategic emerging industries such as new energy vehicles and 5G communications.Here,continuous tension annealing is utilized to obtain improved nanocrystalline alloy with excellently stable permeability of~400 when frequencies ranging from 1 kHz to 10 MHz.The uniaxial anisotropy energy is up to 2503 J/m^(3) and narrow strip-like domains are formed with equal width and transverse orientation after tension annealing treatment.This study can potentially revolutionize the way for future integrated transformers and induction in modern electronic devices.
作者
郭志君
杨晓萱
蔡名娟
李军
凡艳舟
罗强
沈宝龙
GUO Zhijun;YANG Xiaoxuan;CAI Mingjuan;LI jun;FAN Yanzhou;LUO Qiang;SHEN Baolong(Jiangsu Key Laboratory of Advanced Metallic Materials,School of Materials Science and Engineering,Southeast University,Nanjing 211189,China;Anhui Province Key Laboratory of Low-Energy Quantum Materials and Devices,High Magnetic Field Laboratory,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China)
出处
《中国科学:物理学、力学、天文学》
北大核心
2025年第8期244-255,共12页
Scientia Sinica Physica,Mechanica & Astronomica
基金
国家重点研发计划(编号:2022YFB3804100)
国家自然科学基金(编号:52231005)
宜兴市“陶都之光”科技攻关计划(编号:C2024002)资助项目。
关键词
铁基纳米晶合金
恒导磁特性
连续张应力热处理
磁各向异性
Fe-based nanocrystalline alloy
stable permeability
continuous tension annealing
magnetic anisotropy
