晶粒取向对M型钡铁氧体纳米线阵列磁性能的影响:微磁学模拟与环行器设计  

Effect of grain orientation on the magnetic properties of M-type Ba ferrite nanowires array:micromagnetic simulation and circulator design

作　　者：卢宪强 韩满贵 LU Xian-qiang;HAN Man-gui(School of Materials and Energy,University of Electronic Science and Technology of China,Chengdu 610054,China)

机构地区：[1]电子科技大学材料与能源学院,四川成都610054

出　　处：《磁性材料及器件》2020年第5期14-19,25,共7页Journal of Magnetic Materials and Devices

摘　　要：相比于块体或者薄膜结构,纳米线阵列结构的M型钡铁氧体由于具有极高的形状各向异性、剩磁比和更高的共振频率,非常适合应用在Ka波段自偏置环行器中。通过微磁学模拟手段详细研究了晶粒取向对M型钡铁氧体纳米线阵列磁性能的影响,并基于微磁学模拟结果设计了自偏置环行器。结果表明,随着取向角φ的减小,M型钡铁氧体纳米线阵列的剩磁比、矫顽力和共振频率增高,在φ=10°时,剩磁比高达0.99,矫顽力μ0Hc=1285 mT,共振频率为54 GHz。环行器的性能也随着取向角φ的减小而变好,在φ=10°时,环行器工作频率为41.4 GHz,工作带宽达1270 MHz。Compared with bulk magnets or magnetic films,M-type hexagonal ferrite nanowires array shows higher remanence ratio,resonance frequency,and extremely large shape anisotropy.It is believed that these type materials are very suitable for developing Ka-band self-biased circulator.In this paper,the magnetic properties of M-type hexagonal ferrite nanowires array with different grain orientations have been investigated using micromagnetic simulation.A self-biased circulator has been designed based on the results of micromagnetic simulation.The impacts of grain orientations on the static,dynamic magnetic responses and the performances of circulators have been studied.The results show that the remanence ratio and resonance frequency of M-type hexagonal ferrite nanowires array increase with decreasing the orientation angle(φ).Whenφis 10°,the remanence ratio is 0.99,coercivity is 1285 mT and the resonance frequency is about 54 GHz.The performance figures of circulator are found increasing with decreasing of the orientation angle.Whenφis 10°,the operating frequency of circulator is 41.4 GHz and the operating band width is 1270 MHz.

关 键 词：纳米线阵列 六角铁氧体 晶粒取向 微磁学模拟 环行器 

分 类 号：TM277[一般工业技术—材料科学与工程] TN621[电气工程—电工理论与新技术]