Abstract (Li1+, Al3+) co-doped Ni0.5Zn0.5Fe2O4 ferrites, Ni0.5-xZn0.5-xLixAlxFe2O4 (x = 0.000, 0.025, 0.050 and 0.100), were synthesized by the sol-gel auto-combustion method. X-ray diffraction (XRD), field emission scanning electronic microscope (FESEM), vibrating sample magnetometer (VSM) and LCR meter were used to investigate the structural, magnetic and dielectric properties. Results of XRD and SEM indicate that both doping amount and calcination temperature play significant roles in crystal structure and grain growth. Also, it can be observed that the saturation magnetization and the coercivity change in a noticeable manner. The Ni0.475Zn0.475Li0.025Al0.025Fe2O4 ferrite sintered at 1200 °C has a relatively low coercivity value (62.93 Oe) and the largest saturation magnetization (110.95 emu/g). Besides, dielectric behavior is also improved by Li1+ and Al3+ co-doping.

中文翻译：

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溶胶-凝胶自燃法制备(Li1+,Al3+)共掺杂Ni0.5Zn0.5Fe2O4铁氧体陶瓷的结构、磁学和介电性能

摘要 采用溶胶-凝胶自燃法合成了(Li1+, Al3+)共掺杂Ni0.5Zn0.5Fe2O4铁氧体Ni0.5-xZn0.5-xLixAlxFe2O4 (x = 0.000, 0.025, 0.050 and 0.100)。使用X射线衍射（XRD）、场发射扫描电子显微镜（FESEM）、振动样品磁强计（VSM）和LCR计来研究结构、磁性和介电性能。XRD和SEM结果表明，掺杂量和煅烧温度对晶体结构和晶粒生长都有重要影响。此外，可以观察到饱和磁化强度和矫顽力以显着的方式变化。1200℃烧结的Ni0.475Zn0.475Li0.025Al0.025Fe2O4铁氧体具有相对较低的矫顽力值（62.93 Oe）和最大的饱和磁化强度（110.95 emu/g）。除了，