Cr-Fe-Mn合金中的反铁磁性及输运性质  

ANTIFERROMAGNETISM AND TRANSPORT PROPERTIES IN Ce-Fe-Mn ALLOYS

作　　者：徐未名[1] 陈兆甲[1] 沈保根[2] 王克勤[3] 王瑞平[3] 

机构地区：[1]中科院北京低温技术实验中心,北京100080 [2]中科院物理所磁学国家重点实验室 [3]中国科技大学物理系,合肥230026

出　　处：《低温物理学报》1997年第1期17-20,共4页Low Temperature Physical Letters

基　　金：国家教委归国人员基金

摘　　要：本工作通过对Cr_(75)(Fe_xMn_(1-x))_(25)合金在液氮温区的电阻、热电势、比热的测量对该合金的磁性进行了研究,结果表明,x=0.64,0.72样品的电阻在奈尔温度下随温度降低而上升,热电势随温度变化有一最大值,说明该合金具有自旋密度波型的反铁磁性,x=0.84样品在居里温度处电阻变化有一转折,在热电势曲线中观察到了声子曳引峰,三个样品的比热在磁相转变温度处无显著突变。The magnetic properties of Cr_(75) (Fe_xMn_(1-x))_(25) alloys have been studied by measuring the electrical resistance, thermal-power, and specific heat. The anomalies in the transport properties for samples x=0.64, 0.72 indicated the existence of spin density wave type antiferromagnetism in this temperature range. For sample x=0.84, T_c was observed from electrical resistance curve and the increase of the thermal-power with decreasing temperature can probably be ascribed to phonon drag. No sharp anomalies are observed in specific heats at magnetic transition temperature.

关 键 词：铬合金 反铁磁性 低温 输运性质 

分 类 号：TG144[一般工业技术—材料科学与工程] O153[金属学及工艺—金属材料]