玻璃包覆磁性微丝的制备及微波电磁性能  

Synthesis and microwave electromagnetic properties of glass-coated magnetic microwires

作　　者：邸永江[1] 江建军[1] 吴挺华[1] 何华辉[1] 

机构地区：[1]华中科技大学电子科学与技术系,湖北武汉430074

出　　处：《功能材料》2007年第2期173-175,共3页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50371029);新世纪优秀人才支持计划资助项目(NCET-04-0702);湖北省杰出青年基金计划资助项目(2005ABB002)

摘　　要：采用Taylor-Ulitovsky方法制备了Fe基和Co基非晶态玻璃包覆微丝，测试并分析了玻璃包覆微丝的微结构、微观形貌、静磁性能及其微波复磁导率和复介电常数。研究结果表明，通过改变拉丝速度，可以制备出直径6．3～23．5μm的非晶态玻璃包覆微丝；制备时通过水冷或气氛保护可以控制样品的物相组成。典型样品的各项异性等效场高达7．96μ10^3A／m。Fe基样品磁导率在6．3GHz具有自然共振峰，Co基样品在所测频率范围没有共振峰，此测量结果和根据理论计算的自然铁磁共振频率基本一致。典型样品的相对微波复介电常数均低于25且随频率升高而降低。Glass-coated Fe-rich and Co-rich microwires were synthesized by the Tayor-Ulitovsky method. The microstructure, morphology, magnetic parameters, complex permeability and complex permittivity on 2 18GHz of microwire samples was measured. The results showed that the diameters of microwires could be Controlled by the draw-bench speed. The crystal structures of microwires were controlled by water-cooling or by experimental atmospheres. The effective anisotropy field of some microwires was about 7. 96 × 10^3 A/m, The natural ferromagnetic resonance was observed in 6~7GHz in Fe-rich microwire samples, but was not observed Co-rich microwire samples. This result of resonance frequency is in agreement with the value calculated by Kittel model. The complex permittivity of both Fe-rich and Co-rich microwires were less than 25 and lowering with increasing of frequency.

关 键 词：玻璃包覆微丝 非晶态磁性材料 各向异性 电磁性能 

分 类 号：O441.6[理学—电磁学] TG356.4[理学—物理]