Chemical composition and magnetism of Ag doped LaMnO3

By using a sol-gel clue, a set of polycrystalline perovskite samples La1-xAgxMnO3 with a nominal doping level x ranging from 0.05 to 0.45 has been synthesized. The chemical composition and the magnetism of the samples were investigated. A little Ag was： found seeping from the samples in the sintering process when the doping level exceeded 0.05 and the sintering temperature was higher than 700℃ resulting in the samples being in multiphase. The magnetic transition points of the samples have been found to decrease with increasing sintering temperature. A concentration-dependent Tc similar to that of bivalent metal ion doped perovskite, has been obtained. We believe that the Ag seeping in the sintering process is responsible for those magnetic characteristics.

Chemical composition and magnetism of Ag doped LaMnO3

By using a sol-gel clue, a set of polycrystalline perovskite samplesLa粒状系统;复合材料;磁力;Ag;LaMnO3granular system, composite,magnetismProjectsupported by the National Natural Science Foundation of China (GrantNos 10674071 and 20473038), the Foundation of High-Tech Project inJiangsu Province, China (Grant No BG-2005041).2005-12-242007-07-09By using a sol-gel clue, a set of polycrystalline perovskite samples La1-xAgxMnO3 with a nominal doping level x ranging from 0.05 to 0.45 has been synthesized. The chemical composition and the magnetism of the samples were investigated. A little Ag was： found seeping from the samples in the sintering process when the doping level exceeded 0.05 and the sintering temperature was higher than 700℃ resulting in the samples being in multiphase. The magnetic transition points of the samples have been found to decrease with increasing sintering temperature. A concentration-dependent Tc similar to that of bivalent metal ion doped perovskite, has been obtained. We believe that the Ag seeping in the sintering process is responsible for those magnetic characteristics.Magnetoeletronic Laboratory, Nanjing Normal University, Nanjing 210097, China;Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China;University of Shanghai for Science and Technology,Shanghai 200000, China;Magnetoeletronic Laboratory, Nanjing Normal University, Nanjing 210097, China;Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China;Chemical Department, Nanjing Normal University, Nanjing210097, ChinaCorresponding author. E-mail： zhangning@njnu.edu.cn/qk/85823A/200801/26433208.html7560J, 8160H, 7550DBy using a sol-gel clue, a set of polycrystalline perovskite samplesLa粒状系统;复合材料;磁力;Ag;LaMnO3granular system, composite,magnetismProjectsupported by the National Natural Science Foundation of China (GrantNos 10674071 and 20473038), the Foundation of High-Tech Project inJiangsu Province, China (Grant No BG-2005041).2005-12-242007-07-09By using a sol-gel clue, a set of polycrystalline perovskite samples La1-xAgxMnO3 with a nominal doping level x ranging from 0.05 to 0.45 has been synthesized. The chemical composition and the magnetism of the samples were investigated. A little Ag was： found seeping from the samples in the sintering process when the doping level exceeded 0.05 and the sintering temperature was higher than 700℃ resulting in the samples being in multiphase. The magnetic transition points of the samples have been found to decrease with increasing sintering temperature. A concentration-dependent Tc similar to that of bivalent metal ion doped perovskite, has been obtained. We believe that the Ag seeping in the sintering process is responsible for those magnetic characteristics.Magnetoeletronic Laboratory, Nanjing Normal University, Nanjing 210097, China;Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China;University of Shanghai for Science and Technology,Shanghai 200000, China;Magnetoeletronic Laboratory, Nanjing Normal University, Nanjing 210097, China;Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China;Chemical Department, Nanjing Normal University, Nanjing210097, ChinaCorresponding author. E-mail： zhangning@njnu.edu.cn/qk/85823A/200801/26433208.html7560J, 8160H, 7550DBy using a sol-gel clue, a set of polycrystalline perovskite samplesLa粒状系统;复合材料;磁力;Ag;LaMnO3granular system, composite,magnetismProjectsupported by the National Natural Science Foundation of China (GrantNos 10674071 and 20473038), the Foundation of High-Tech Project inJiangsu Province, China (Grant No BG-2005041).2005-12-242007-07-09By using a sol-gel clue, a set of polycrystalline perovskite samples La1-xAgxMnO3 with a nominal doping level x ranging from 0.05 to 0.45 has been synthesized. The chemical composition and the magnetism of the samples were investigated. A little Ag was： found seeping from the samples in the sintering process when the doping level exceeded 0.05 and the sintering temperature was higher than 700℃ resulting in the samples being in multiphase. The magnetic transition points of the samples have been found to decrease with increasing sintering temperature. A concentration-dependent Tc similar to that of bivalent metal ion doped perovskite, has been obtained. We believe that the Ag seeping in the sintering process is responsible for those magnetic characteristics.Magnetoeletronic Laboratory, Nanjing Normal University, Nanjing 210097, China;Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China;University of Shanghai for Science and Technology,Shanghai 200000, China;Magnetoeletronic Laboratory, Nanjing Normal University, Nanjing 210097, China;Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China;Chemical Department, Nanjing Normal University, Nanjing210097, ChinaCorresponding author. E-mail： zhangning@njnu.edu.cn/qk/85823A/200801/26433208.html7560J, 8160H, 7550DBy using a sol-gel clue, a set of polycrystalline perovskite samplesLa$_{1 - x}$Ag$_{x}$MnO$_{3}$ with a nominal doping level $x$ rangingfrom 0.05 to 0.45 has been synthesized. The chemical composition andthe magnetism of the samples were investigated. A little Ag was foundseeping from the samples in the sintering process when the dopinglevel exceeded 0.05 and the sintering temperature was higher than700du, resulting in the samples being in multiphase. The magnetictransition points of the samples have been found to decrease withincreasing sintering temperature. A concentration-dependent $T_{rmc}$ similar to that of bivalent metal ion doped perovskite, has beenobtained. We believe that the Ag seeping in the sintering process isresponsible for those magnetic characteristics.