离子取代对高介YIG铁氧体材料的性能影响  

Effect of ion substitution on properties of high dielectric constant YIG ferrite materials

作　　者：杨钊[1] 梁吉 苏桦[1] YANG Zhao;LIANG Ji;SU Hua(State Key Laboratory of Electronic Thin Films and Integrated Devices,University of Electronic Science and Technology of China,Chengdu 611731,China)

机构地区：[1]电子科技大学电子薄膜与集成器件国家重点实验室,四川成都611731

出　　处：《电子元件与材料》2023年第6期681-686,共6页Electronic Components And Materials

基　　金：国家自然科学基金(62071106);四川省重点研发项目(2021YFG0221)。

摘　　要：基于固相反应烧结法制备了Bi_(x)Y_(3-x-y)Ca_(y)M_(y)Fe_(5-y)O_(12)(x=1.0~1.6,y=0.1~0.5,M为4价离子Zr^(4+)、Sn^(4+))旋磁铁氧体材料。首先分析了不同Bi^(3+)离子取代量对材料介电性能和微波旋磁性能的影响,由此确定最佳的Bi^(3+)离子取代量。然后在其基础上,研究了不同Ca^(2+)/Zr^(4+)和Ca^(2+)/Sn^(4+)离子共取代对材料综合性能的影响。研究表明,当Bi^(3+)离子取代量x为1.4时,能最好地兼顾YIG铁氧体材料高介电常数和低铁磁共振线宽的综合要求。进一步对Ca^(2+)/Zr^(4+)和Ca^(2+)/Sn^(4+)离子共取代的研究发现,采取Ca^(2+)/Zr^(4+)共取代的方案(最佳取代量y为0.4),更有助于获得高的介电常数,其最佳性能为:Ms=145 kA/m,ε=29.4,ΔH=2.7 kA/m;而采用Ca^(2+)/Sn^(4+)共取代的方案(最佳取代量y为0.3),则可以在进一步降低铁磁共振线宽上取得突破,其最佳性能为:Ms=147 kA/m,ε=28.5,ΔH=2.2 kA/m。Bi_(x)Y_(3-x-y)Ca_(y)M_(y)Fe_(5-y)O_(12)(x=1.0-1.6,M is 4-valent ions Zr^(4+),Sn^(4+),y=0.1-0.5)gyromagnetic ferrite materials were prepared by solid phase reaction sintering method.Firstly,the effects of the Bi^(3+)content on the dielectric properties and microwave gyromagnetic properties of the materials were analyzed,and the optimal Bi^(3+)content was determined.Secondly,the effects of co-substitution of Ca^(2+)/Zr^(4+)and Ca^(2+)/Sn^(4+)ions on the comprehensive properties of the materials were investigated.The results show that when the Bi^(3+)content is 1.4,the high dielectric constant and low ferromagnetic resonance linewidth of YIG ferrite were satisfied.Further studies of Ca^(2+)/Zr^(4+)and Ca^(2+)/Sn^(4+)co-substitution show that Ca^(2+)/Zr^(4+)co-substitution(the optimal substitution amount is 0.4)is more beneficial to the high dielectric constant(best performance:Ms=145 kA/m,ε=29.4,ΔH=2.7 kA/m),while the Ca^(2+)/Sn^(4+)co-substitution scheme(the best substitution amount is 0.3)can further reduce the ferromagnetic resonance linewidth(best performance:Ms=147 kA/m,ε=28.5,ΔH=2.2 kA/m).

关 键 词：旋磁铁氧体 介电性能 Bi^(3+)取代 共取代 铁磁共振线宽 

分 类 号：TM277.3[一般工业技术—材料科学与工程]