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Structual, Magnetic, and Transport Properties of LaMn1-xCuxO3 (x= 0-0.125) Ceramics

Publish Year: 1400
Type: Journal paper
Language: English
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JR_ACERPT-7-1_001

Index date: 8 May 2021

Structual, Magnetic, and Transport Properties of LaMn1-xCuxO3 (x= 0-0.125) Ceramics abstract

The present study investigates the structural, magnetic, and electrical properties of non-stoichiometric  LaMn1-xCuxO3 (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 LaMn1-xCuxO3-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.

Structual, Magnetic, and Transport Properties of LaMn1-xCuxO3 (x= 0-0.125) Ceramics Keywords:

Structual, Magnetic, and Transport Properties of LaMn1-xCuxO3 (x= 0-0.125) Ceramics authors

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

Bagher Aslibeiki

Department of Physics, University of Tabriz, Tabriz ۵۱۶۶۶-۱۶۴۷۱, Iran

H. Salamati

Department of Physics, Isfahan University of Technology, Isfahan, Isfahan, Iran

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