摘要
采用溶胶-凝胶法制备了La-Zn替代M型锶铁氧体Sr1-xLaxFe12-xZnxO19(x=0～0.5)纳米晶粒.实验结果表明,随替代量x的增大,比饱和磁化强度(s先增大后缓慢下降,而矫顽力Hc单调减小,这非常有利于用作高密度磁记录材料.通过对Sr0.7La0.3Fe11.7Zn0.3O19的相变过程分析,发现-Fe2O3是六角晶系锶铁氧体相形成的前驱体,退火温度在650℃下前样品主要表现为尖晶石相的软磁行为.
La-Zn substituted Sr1-xLaxFe12-xZnxO19(x=0~0.5), nanoparticles were prepared by chemical sol-gel route. The experimental results show that saturation magnetization ss increases at the beginning and then decreases slowly,while coercive strength Hc decreases monotonously with increasing x, which is very beneficial to high-density magnetic recording. The results of phase transition of Sr0.7La0.3Fe11.7Zn0.3O19 indicate that g-Fe2O3 phase is formed prior to strontium hexaferrite phase. The samples show nearly soft magnetic behavior below annealing temperature 650℃.
出处
《磁性材料及器件》
CAS
CSCD
2004年第3期22-25,共4页
Journal of Magnetic Materials and Devices
基金
安徽省重点科研项目(02022024)
安徽省科学和技术带头人资助项目(01080210)
关键词
锶铁氧体纳米晶
溶胶-凝胶法
La-Zn替代
相变
磁性能
strontium hexaferrite nanoparticle
sol-gel technique
La-Zn substitution
phase transition
magnetic property
