非晶态Fe_（90－x）Co_xZr_（10）合金的Invar效应研究  

INVAR EFFECT OF AMORPHOUS Fe_(90-x)Co_xZr_(10) ALLOYS

作　　者：卢志超[1,2,3,4] 鲜于泽[1,2,3,4] 李际周[1,2,3,4] 叶春堂[1,2,3,4] 李竹起 康健[1,2,3,4] 沈保根[1,2,3,4] 吕曼祺[1,2,3,4] 

机构地区：[1]东北大学 [2]中国原子能科学研究院 [3]中国科学院物理研究所 [4]中国科学院金属研究所

出　　处：《金属学报》1994年第3期B126-B129,共4页Acta Metallurgica Sinica

摘　　要：研究了作晶态Ｆｅ_（９０－ｘ）Ｃｏ_ｘＺｒ_（１０）合金的磁体积效应和广义声子谱．通过热膨胀测量和磁测量给出了自发体积磁致伸缩ωｓ和平均磁矩μ_（ＦｅＣｏ）与平均价电子数Ｎ_（ｅｆｆ）的关系，发现ωｓ的峰值位置与μ_（ＦｅＣｏ）开始急剧下降的位置（Ｎ_（ｅｆｆ）＝８．１－８．２）相对应，从而证实了金属－金属型非晶态因瓦合金中的Ｉｎｖａｒ效应与铁磁态的不稳性有关．用非弹性中子散射方法测量了广义声子谱，从中观察到了与Ｉｎｖａｒ效应相关的声子谱软化现象．The magneto-volume effect and the generalized phonon densities of states for amorphous Fe90-xCoxZr10 alloys have been studied. The average number of valence electrons Neff dependences of the spontaneous magnetostriction ωs and the average magnetic moment μFeCo have been obtained, and it has been found that the ωs takes a maximum at Neff=8.1-8.2 where the μFeCo begins to decrease drastically.The generalized phonon densities of states (PDOS) were deduced from inelastic neutron scattering experiments, and the phonon softening phenomenon in amorphous Invar alloy was observed from phonon spectra.

关 键 词：金属玻璃 铁钴锆合金 Invar效应 

分 类 号：TG139.8[一般工业技术—材料科学与工程]