Guohua Bai, Jiayi Sun, Zhenhua Zhang, Xiaolian Liu, Sateesh Bandaru, Weiwei Liu, Zhong Li, Hongxia Li, Ningning Wang, Xuefeng Zhang
Soft magnetic materials with stable permeability up to hundreds of megahertz (MHz) are urgently needed for integrated transformers and inductors, which are crucial in the more-than-Moore era. However, traditional frequency-stable soft magnetic ferrites suffer from low saturation magnetization and temperature instability, making them unsuitable for integrated circuits. Herein, we fabricate a frequency-stable soft magnetic composite featuring a magnetic vortex structure via cold-sintering, where ultrafine FeSiAl particles are magnetically isolated and covalently bonded by Al2 SiO5 /SiO2 /Fe2 (MoO4 )3 multilayered heterostructure...
March 12, 2024: Nature Communications