Materials and Energy Research Center (MERC) Iranian Ceramic Society (ICERS) Advanced Ceramics Progress 2423-7477 7 1 2021 03 01 Structual, Magnetic, and Transport Properties of LaMn1-xCuxO3 (x= 0-0.125) Ceramics 1 10 127889 10.30501/acp.2021.233610.1044 EN P. Kameli Department of Physics, Isfahan University of Technology, Isfahan, Isfahan, Iran H. Vaezi Department of Physics, Isfahan University of Technology, Isfahan, Isfahan, Iran M. H. Ehsani Department of Physics, Semnan University, Semnan, Semnan, Iran 0000-0002-7169-7496 B. Aslibeiki Department of Physics, University of Tabriz, Tabriz, East Azerbaijan, Iran 0000-0003-3366-0761 H. Salamati Department of Physics, Isfahan University of Technology, Isfahan, Isfahan, Iran Journal Article 2020 09 13 The present study investigates the structural, magnetic, and electrical properties of non-stoichiometric  LaMn_1-xCu_xO₃ (x= 0, 0.025, 0.05, 0.075, and 0.125) ceramics. The results of X-ray diffraction refinement indicated that all samples were crystallized in an orthorhombic structure and no apparent crystal structure change was introduced by doping Cu up to x=0.125. The Ferromagnetic (FM) nature revealed by non-stoichiometric LaMn_1-xCu_xO_3-_d was verified through the appearance of Paramagnetic-Ferromagnetic (PM-FM) transition temperatures in AC magnetic susceptibility measurement of the samples. Due to the coexistence of Antiferromagnetic (AFM) and FM phases, all samples contained Re-entrant Spin Glass (RSG) and Cluster Spin Glass (CSG) states. The results showed that FM phase was comparable or even dominant in the doped samples up to x=0.075; however, after doping, AFM phase overcame the FM phase as a result of reduction of double exchange interaction. Temperature dependence of resistivity measurement indicated that upon increasing the Cu-doping level, resistivity decreased, except for the x=0.125 sample, and that metal-insulator transition at low temperatures was detected in the doped samples. Furthermore, changing the magnetic phase in the case of x=0.125 sample from FM (in x=0.075) to AFM dominant phase was accompanied by changing the transport parameters obtained from small polaron hopping models. https://www.acerp.ir/article_127889_9adb1e63f4d317fcd6eb11b91b18d20c.pdf