烧绿石材料Bi_(2-x)Fe_xIr_2O_7的电输运性质  

Transport Properties of Pyrochlore Materials Bi_(2-x)Fe_xIr_2O_7

作　　者：边健[1] 朱守金 刘慧[1] 丰远 马翠玲[3] 吕晓棠[3] BIAN Jian;ZHU Shoujin;LIU Hui;FENG Yuan;MA Cuiling;LYU Xiaotang(Department of Mathematics and Physics,Hefei University,Anhui Hefei 230601,China;University Physics Laboratory,Anhui Sanlian University,Anhui Hefei 230601,China;Department of Architecture and Civil Engineering,Hefei University,Anhui Hebei 230601,China)

机构地区：[1]合肥学院数学与物理学系,安徽合肥230601 [2]安徽三联学院大学物理实验室,安徽合肥230601 [3]合肥学院建筑工程系,安徽合肥230601

出　　处：《河北师范大学学报（自然科学版）》2018年第6期484-487,共4页Journal of Hebei Normal University：Natural Science

基　　金：国家自然科学青年基金(11604071);安徽省质量工程项目(2016jyxm0864;2016jyxm0865);合肥学院校级教研项目(2017jyxm013);合肥学院质量工程项目(2016年大学物理虚拟实验中心);安徽省高校自然科学重点项目(KJ2016A599;KJ2017A548);合肥学院学院自然科学研究项目(18ZR13ZDA;18ZR14ZDA);安徽三联学院校级平台基金(PTZD2018001)

摘　　要：采用固相法烧制了烧绿石材料Bi_(2-x)Fe_xIr_2O_7(x=0.1,0.2,0.3,0.4);X线衍射证实了Bi_(2-x)Fe_xIr_2O_7的立方结构,样品呈现出很好的单相;通过标准四引线法测量电阻率,样品发生了金属-绝缘体转变,随着Fe掺杂含量的增加,金属-绝缘体转变温度呈上升趋势;对样品的金属体区域和绝缘体区域分别进行了电阻率-温度(ρ-T)拟合分析.The pyrochlore materials Bi2-x Fe2 Ir2 O7 （z = 0. 1,0.2,0.3 and 0.4） were prepared by solid state method. X-ray diffraction confirmed that Bi2 -xFecIr2O7 is cubic structure and the sample exhibits good single phase. Electrical resistivity measurements were carried out by standard four probe method, and met- al-insulator transition occurred. With the increase of Fe doping content, the transition temperature of metal- insulator transition increases. In order to further understand the transformation mechanism, the resistivity- temperature（p--T） fitting analysis was carried out for the metal region and the insulator region of the sam- ple.

关 键 词：烧绿石材料 FE掺杂 电输运 

分 类 号：O482.52[理学—固体物理]