反钙钛矿Mn_3AN(C)化合物中的负热膨胀与磁相转变（英文）  

Negative Thermal Expansion and Magnetic Phase Transition in Antiperovskite Mn_3AN(C) Compounds

作　　者：史再兴 王聪[1] 闫君[1] 褚立华[1] 丁磊[1] 孙莹[1] 温永春[2] 

机构地区：[1]北京航空航天大学凝聚态物理与材料物理研究中心,北京100191 [2]盐城工学院,江苏盐城224051

出　　处：《硅酸盐学报》2014年第3期286-295,共10页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(91122026;51172012)资助项目

摘　　要：负热膨胀材料在诸多工业领域拥有广阔应用价值,在此类材料中,锰基反钙钛矿化合物近年来被广泛研究。本工作对具有负膨胀效应的Mn3AN(C)(A=主族或过渡族元素)化合物进行了综述与评论。讨论了该化合物特殊热膨胀行为及与磁结构和磁相转变的关系,指出其特殊磁结构是Mn3AN(C)化合物中产生磁容积效应的重要因素,Fermi能级处的电子态密度与磁相转变具有强关联性。由负热膨胀材料Mn3AN与金属铜组成的金属基复合材料显示有低热膨胀和近零热膨胀行为,可通过改变Mn3Cu0.5A0.5N(A=Ni,Sn)的混合含量,调控金属铜的热膨胀系数。Negative thermal expansion （NTE} materials are widely used in various industries. Among these materials, antiper- ovskite manganese compounds have obatined considerable attentions in recent years. This paper investigated Mn3 AN（C） （A= Main group elements or transition metals） compounds with the NTE effects. The peculiar thermal expansion behavior of the compounds and the relationship between magnetostructures and magnetic phase transition were discussed. The special magneto- structure is an important factor having the magnetovolume effect （MVE） in Mn3 AN（C）, and the electronic density of states at the Fermi level has a strong connection with the magnetic phase transition. In addition, the metal matrix composites consisting of NTE material Mn3 AN and metal Cu displayed low and nearly-zero thermal expansion behavior were also concerned. It is in- dicated that the thermal expansion coefficient of Cu metal could be effectively controlled via the adjustment of the composited Mn3Cu0.5A0.5N （A=Ni, Sn） content.

关 键 词：负热膨胀 反钙钛矿 磁结构 磁相转变 

分 类 号：O482[理学—固体物理]