In this paper, a series of the gyromagnetic ferrite Li_0.43Zn_0.26Ti_0.12Mn_xFe_2.19−xO₄ (x=0–0.14) samples were prepared with the solid-phase reaction sintering method. The influences of Mn³⁺ doping on the microscopic morphology, ferromagnetic resonance linewidth, and microwave dielectric loss of LiZnTi ferrite were investigated. Doping in an appropriate amount of Mn³⁺ will reduce the saturation magnetization of the sample and the magnetocrystalline anisotropy of the ferrite. It also inhibited the generation of Fe²⁺ and reduced the porosity, to the benefit of keeping the ferromagnetic resonance linewidth (ΔH) of the material and microwave dielectric loss at a low level. The results suggested that when the doping amount of Mn³⁺ is 0.08, the ferromagnetic resonance linewidth of the material is 27.8נ10³ A m⁻¹, the microwave dielectric loss tangent tanδ _ε equals to 0.001, and the B-H hysteresis loop remanence ratio of the sample reaches 0.87, which is a beneficial application in lock-type microwave ferrite devices.

本文采用固相反应烧结法制备了一系列旋磁铁氧体Li _0.43 Zn _0.26 Ti _0.12 Mn _x Fe _2.19-x O ₄（x = 0-0.14）样品。研究了Mn ³⁺掺杂对LiZnTi铁氧体微观形貌，铁磁共振线宽和微波介电损耗的影响。掺杂适量的Mn ³⁺会降低样品的饱和磁化强度和铁氧体的磁晶各向异性。它还抑制了Fe ²⁺的生成并降低了孔隙率，从而有利于保持铁磁共振线宽（ΔH）的材料和微波介电损耗处于较低水平。结果表明，当Mn的掺杂量³⁺为0.08，材料的铁磁共振行距是27.8נ10 ³ A M ^-1，微波介电损耗正切δ _ε等于0.001，并且BH磁滞回线剩磁比样品的样品达到0.87，这在锁定型微波铁氧体设备中是一个有益的应用。