Effects of Lanthanum Doping on the Microstructure and Electromagnetic Properties of X-Type Hexaferrite Ba 2 Co 2 Fe 28 O 46 Prepared by High-Temperature Solid-State Reaction. - Li, Ning; Guo, Ziyu; Zhang, Yupeng; Li, Qin; Dong, Fuyuan; Feng, Gangli (Materials (1996-1944), 2026)