铁基非晶态因瓦合金的声子谱研究  

PHONON DENSITIES OF STATES IN Fe-BASED AMORPHOUS INVAR ALLOYS

作　　者：鲜于泽[1] 卢志超[1] 李际周[1] 叶春堂[1] 李竹起 康健[1] 沈保根[1] 

机构地区：[1]东北工学院物理系,中国原子能科学研究院,中国科学院物理研究所

出　　处：《物理学报》1994年第1期99-102,共4页Acta Physica Sinica

摘　　要：用非弹性中子散射实验方法研究了非晶态Ｆｅ＿（９０－ｘ）Ｃｏ＿ｘＺｒ＿（１０）（ｘ＝１０，４０）和Ｆｅ＿（８０－ｙ）Ｃｒ＿ｙＰ＿（１３）Ｃ＿７（ｙ＝４，８）合金的广义声子谱，在低能区域（≤２０ｍｅＶ）观察到了与因瓦效应相关的声子谱软化现象。初步讨论了这种动力学方面的反常行为。结果表明，声子谱软化可能与在因瓦合金中存在增强的电子－声子相互作用有关。Generalized phonon densities of states(PDOS)for amorphous Fe_(90-x)Co_xZr_(10)(x=10,40)and Fe_(80-y)Cr_yP_(13)C_7(y=4,8)alloys have been deduced from inelasticneutron scattering experiments. And the softening plienomena of the PDOS in theenergy region below 17 meV have been observed for the amorphous Invar alloys. The anomalies in the dynamics of Invar alloys were discussed, and preliminary re-sults show that the phonon softening of the amorphous Invar alloys may closely co-nnected with the enhanced electron-phonon interaction in Invar alloys.

关 键 词：金属玻璃 因瓦效应 声子谱 

分 类 号：O751[理学—晶体学]