Domain structure of hard magnetic NdAlFeCo bulk metallic glass  

作　　者：WEI Bingchen WANG Weihua PAN Mingxiang HAN Baoshan ZHANG Zhenrong HU Wenrui 

机构地区：[1]National Microgravity Laboratory,Institute of Mechanics,Beijing 100080,China [2]Institute of Physics and Center for Condensed Matter Physics,Chinese Academy of Sciences,Beijing 100080,China [3]State Key Laboratory of Magnetism,Institute of Physics and Center for Condensed Matter Physics,Chinese Academy of Sciences,Beijing 100080,China

出　　处：《Chinese Science Bulletin》2001年第19期1595-1598,共4页

基　　金：The work was supported by the National Natural Science Foundation of China (Grant Nos. 59925101 and 50031010); and the State Science and Technology Commission (Grant No. 95-yu-34).

摘　　要：Magnetic domain structure of hard magnetic Nd60Al10Fe20Co10 bulk metallic glass (BMG) has been studied by using magnetic force microscopy. In the magnetic force images it is shown that the exchange interaction type magnetic domains with a period of about 360 nm do exist in the BMG, which is believed to be associated with the appearance of hard-magnetic properties in this system. As the scale of the magnetic domain is much larger than the size of the short-range ordered atomic clusters existing in the BMG, it is believed that the large areas of magnetic contrast are actually a collection of a group of clusters aligned in parallel by strong exchange coupling interaction. After fully crystallization, the BMG exhibits paramagnetism. No obvious magnetic contrast is observed in the magnetic force images of fully crystallized samples, except for a small quantity of ferromagnetic crystalline phase with low coercivity and an average size of 900 nm.Magnetic domain structure of hard magnetic Nd60Al10Fe20Co10 bulk metallic glass (BMG) has been studied by using magnetic force microscopy. In the magnetic force images it is shown that the exchange interaction type magnetic domains with a period of about 360 nm do exist in the BMG, which is believed to be associated with the appearance of hard-magnetic properties in this system. As the scale of the magnetic domain is much larger than the size of the short-range ordered atomic clusters existing in the BMG, it is believed that the large areas of magnetic contrast are actually a collection of a group of clusters aligned in parallel by strong exchange coupling interaction. After fully crystallization, the BMG exhibits paramagnetism. No obvious magnetic contrast is observed in the magnetic force images of fully crystallized samples, except for a small quantity of ferromagnetic crystalline phase with low coercivity and an average size of 900 nm.

关 键 词：METALLIC glass HARD MAGNETISM magnetic force MICROSCOPY EXCHANGE coupling interaction. 

分 类 号：TG115[金属学及工艺—物理冶金]