文献类型：期刊文献

英文题名：Tunable dielectric properties in Mn-doped LuFe2O4 system

作者：Hou, Ying[1,2,3];Yao, Yiping[1,2];Dong, Sining[1,2];Huang, Xi[1,2];Sun, Xuefeng[1,2];Li, Xiaoguang[1,2]

机构：[1]Univ Sci & Technol China, Dept Phys, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China;[2]Acad Sinica, Int Ctr Mat Phys, Shenyang 110015, Peoples R China;[3]E China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China

年份：2012

卷号：27

期号：6

起止页码：922

外文期刊名：JOURNAL OF MATERIALS RESEARCH

收录：;EI(收录号：20121214868123);WOS:【SCI-EXPANDED(收录号:WOS:000304065000007)】；

基金：This work is supported by the National Natural Science Foundation of China and the National Basic Research Program of China (2012CB922003, 2011CBA00102, and 2009CB929502).

语种：英文

外文关键词：Dielectric devices - Iron compounds - Manganese - Electric fields - Lutetium compounds

摘要：The dielectric properties and tunability with external magnetic and electric fields for LuFe2-xMnxO4 (0 <= x <= 1) are systematically studied. It was found that the dielectric loss, the ferrimagnetic Curie temperature, and the conductivity reduce with increasing Mn doping. One of the most important results is that the room temperature dielectric tunability with low magnetic and electric fields can be achieved in these samples. The analysis demonstrates that the electron transfer between Fe2+ and Fe3+ is efficiently suppressed with Mn doping and thus results in the decreases of the leaky conductivity and the dielectric loss. Furthermore, from the studies on the combination of impedance and modulus complex planes for the samples with different electrodes, the tunability is found to be more closely related to the extrinsic effect than the intrinsic bulk effect.