Stabilization effects of third element on CaCu5 type derivatives of rare-earth transition-metal intermetallics

作     者：LIANG Jingkui, LIU Quanlin, HUANG Feng, RAO Guanghui and CHEN Xiaolong( Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China International Center of Material Physics, Chinese Academy of Sciences, Shenyang 110015, China) 

出 版 物：《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))

年 卷 期：2002年第2期

页      面：3-12页

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Supported by the Key Project of the National Natural Science Foundation of China (Grant No. 59631070) the State Key Project of Fundamental Research (Grant No. G1998061304) 

主　　题：La2(Co M)17 R(Fe M)12 Rs(Fe M)29 crystal structure magnetic properties. 

摘      要：Part of the results of the key project Search for novel rare-earth functional materials supported by the National Natural Science Foundation of China is reviewed. In combination with reports in literature, the effects of the third element M on the formation and stability of La2(Co, M)17, R(Fe, M)12 and R3(Fe, M)29 intermetallic compounds are discussed by considering mixing enthalpy of M with rare-earth, Fe and Co, and atomic radius, electronegativity and electronic configurations, etc. It is concluded that the mixing enthalpy and atomic radius dominate the preferential sites and the minimum amount of M required to stabilize a structure, which ultimately affect the magnetic properties of a compound prominently. This review should provide some heuristic hints for exploiting novel rare-earth transition metal functional materials and for improving their performance.