铁基纳米微晶合金电流应力退火的穆斯堡尔谱研究  

Mssbauer study on Fe-based nanocrystalline alloys stress-annealed by DC Joule heat

作　　者：赵振杰[1] 阮建中[1] 蒋可玉[1] 曾琅[1] 杨燮龙[1] 

机构地区：[1]华东师范大学物理系,光谱学与波谱学教育部重点实验室,上海200062

出　　处：《核技术》2002年第6期442-446,共5页Nuclear Techniques

摘　　要：利用直流焦耳热加应力和不加应力退火处理Fe73 .5Cu1Nb3 Si13 .5B9非晶合金 ,并用动态磁滞回线、穆斯堡尔谱和纵向驱动巨磁阻抗效应等方法进行研究。结果表明 ,在电流密度大于 4 .11× 10 7A/m2 时 ,Fe73 .5Cu1Nb3 Si13 .5B9非晶合金发生晶化 ,并在应力退火下产生横向磁结构。在一定的条件下 ,感生各向异性随电流密度的增大而增大 ,这与合金中α -FeSi纳米晶粒的多少有着密切的关系。Amorphous Fe 73.5Cu 1Nb 3Si 13.5B 9 alloy was annealed under stress by DC Joule-heating to induce magnetic anisotropy. The magnetic properties of the treated samples were examined by dynamic hystersis loops, longitudinally driven giant magneto-impedance effect and Mssbauer spectra. The experimental results show that nanocrystallization occurs in the amorphous alloys when the current density is above 4.11×10 7A/m 2, and the annealed samples will be induced transverse magnetic anisotropy under suitable current and stress. The magnetic anisotropy increases with the increasing of annealing current density, which is closely related to the amount of α-FeSi nanocrstalline in the alloy.

关 键 词：穆斯堡尔谱 纳米晶合金 巨磁阻抗效应 横向磁结构 

分 类 号：O481.4[理学—固体物理]