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铁基纳米晶合金的介观阻抗率及应用
引用本文:杨全民,许启明,杨燚,方允樟.铁基纳米晶合金的介观阻抗率及应用[J].物理学报,2008,57(2):1008-1012.
作者姓名:杨全民  许启明  杨燚  方允樟
作者单位:(1)华中科技大学文华学院电子与信息工程系,武汉 430074; (2)西安建筑科技大学材料科学与工程学院,西安 710055; (3)西安建筑科技大学材料科学与工程学院,西安 710055;连云港师范高等专科学校物理系,连云港 222006
基金项目:陕西省教育厅科学技术研究计划(批准号:07JC08)和江苏省连云港市工业研究开发计划(批准号:GY200403)资助的课题.
摘    要:提出了铁基纳米晶合金介观阻抗率的物理概念,用Maxwell方程组求得其计算公式ρ=-μ{A}/{t}/Δ×H,该式表明铁基纳米晶合金的介观阻抗率与材料内部的介观磁场强度H、介观磁矢势A和介观磁导率μ有关,磁矢势A是由介观结构引起的量子力学效应,是由合金的微观结构决定的.这个理论很好地解释了铁基纳米晶粉末、粉芯 关键词: Fe基纳米晶合金 介观阻抗率

关 键 词:Fe基纳米晶合金  介观阻抗率
文章编号:1000-3290/2008/57(02)/1008-05
收稿时间:2007-03-30
修稿时间:2007-06-19

Mesoscopic impedivity of Fe-based nanocrystalline alloy and its application
Yang Quan-Min,Xu Qi-Ming,Yang Yi,Fang Yun-Zhang.Mesoscopic impedivity of Fe-based nanocrystalline alloy and its application[J].Acta Physica Sinica,2008,57(2):1008-1012.
Authors:Yang Quan-Min  Xu Qi-Ming  Yang Yi  Fang Yun-Zhang
Abstract:We put forward an physical concep for the mesoscopic impedivity of Fe-based nanocrystalline alloy for the first time, and its formula ρ=-μ{A}/{t}/Δ×His obtained by using Maxwell system of equations. The formula shows that the mesoscopic impedivity ρ of Fe-based nanocrystalline alloy depends on the mesoscopic magnetic field intensity H, mesoscopic magnetic vector potential A, and mesoscopic permeability μ. The mesoscopic magnetic vector potential A is caused by the effect of quantum mechanics with the mesoscopic structure in the studied material, and is determined by the microcosmic structure of the studied material. Magneto-resonance frequency shift of nanocrystalline Fe735Cu1Nb3Si135B9 powder for its giant magneto-impedance(GMI) effect and frequency resonance magnetic field intensity shift of nanocrystalline Fe730Cu10Nb15V20Si135B90 microwire with the multilayer structure for its GMI effect are explained successfully by the formula.
Keywords:Fe-based nanocrystalline alloys  mesoscopic impedivity
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