Heusler合金Cu_2VAl磁性及输运性质的研究  

Magnetism and transport properties of Heuser alloy Cu_ 2 VAl

作　　者：王本阳[1] 千正男[1] 隋郁[1] 刘玉强[1] 苏文辉[1] 张铭[2] 柳祝红[2] 刘国栋[2] 吴光恒[2] 

机构地区：[1]哈尔滨工业大学凝聚态科学与技术研究中心,哈尔滨150001 [2]中国科学院物理研究所磁学国家重点实验室,北京100080

出　　处：《物理学报》2005年第7期3386-3390,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10304004);哈尔滨工业大学科学研究基金(批准号:HIT.2002.46)资助的课题.~~

摘　　要：对Heusler合金Cu2VAl多晶甩带样品进行了磁性与输运性质方面的研究.实验发现Cu2VAl在温度T为210K附近发生铁磁—顺磁相变,为弱铁磁体.输运性质的测量表明在7.2K时电阻因局域杂质超导相变而发生突变,电子和声子之间的散射是主要的散射机理.居里温度TC以下存在侧跃导致的反常霍尔效应,并且7K附近的相变导致霍尔电阻率发生异常.We have investigated magnetic and transport properties of Heusler alloy Cu 2 VAl. Magnetic measurements confirm that the magnetic transition from ferromagnetism to paramagnetism arises near 210K for Cu 2 VAl sample, which is a weak ferromagnet. Resistance curves show that there is a small jump of 1% in resistance caused by the localized impurity superconduction phase transition around 7K. The scattering between electron_phonon is the main scattering mechanism. Furthermore, extraordinary Hall effect exists for side jump at temperatures below T C and the phase transition leads to Hall resistivity changing abnormally at 7K.

关 键 词：输运性质 磁性 合金 反常霍尔效应 实验发现 超导相变 居里温度 散射机理 磁相变 铁磁体 电阻率 声子 电子 

分 类 号：TG139[一般工业技术—材料科学与工程]