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The lattice,magnetic and electrical transport properties in anti-perovskite structured Mn_3AC compounds

Cong Wang  Yongchun Wen  Ying Sun  
【摘要】:正Some anti-perovskite compounds exhibit negative thermal expansion(NTE) behavior in certain temperature range.The NTE effect is closely correlated with magnetic transition and electrical transport property,therefore,exploring their relationship is very important for theory and applications.The Ge-doped cubic anti-perovskite Mn_3A_(1-经)Ge_xC(A=Al,Zn,Sn) compounds were prepared.Their magnetic,electrical transport and structural properties were investigated.The Mn_3AlC compound showed ferromagnetism and metallic -type transport property.Ge-doping did not nearly work on its magnetic and electrical transport.The Cuire temperature points Tc of Mn_3ZnC and Mn_3Zn_(0.5)Ge_(0.5)C were 470 K and 275 K,respectively, and the linear coefficients of thermal expansion(CTE) were always positive and had no abnormal change.For Mn_3Sn_(1-x)Ge_xC(x=0,0.3,0.5),the Yc decreased with the increase of x.
【作者单位】:School of Science,Beihang University
【分类号】:O76
【正文快照】:
Some anti一Perovskite comPounds exhibit negative thermal exPansion(N TE)behavior in eertain temperature range.ll,2]The NTE effeet 15 elosely eorrelated with ma邵etie transition and eleet‘eal transport property[3],therefore,exploring their relationshi

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