Effect of Fe and Co doping on electrical and thermal properties of La{sub 0.5}Ce{sub 0.5}Mn{sub 1−x}(Fe, Co){sub x}O{sub 3} manganites
- Materials Science Laboratory, School of Physics, Devi Ahilya University, Khandwa Road Campus, Indore 452001 (India)
- Department of Physics, National Dong Hwa University, Hualien 97401, Taiwan (China)
Graphical abstract: - Highlights: • Low temperature resistivity minimum contributes to Coulomb and Kondo scattering. • Metallic resistivity shows electron, magnon and phonon scattering are significant. • At high temperatures small polaron conduction mechanism is viable. • Susceptibility measurements show ferromagnetic–paramagnetic transition. - Abstract: The effect of Fe and Co doping on structural, electrical and thermal properties of half doped La{sub 0.5}Ce{sub 0.5}Mn{sub 1−x}(Fe, Co){sub x}O{sub 3} is investigated. The structure of these crystallizes in to orthorhombically distorted perovskite structure. The electrical resistivity of La{sub 0.5}Ce{sub 0.5}MnO{sub 3} exhibits metal-semiconductor transition (T{sub MS} at ∼225 K). However, La{sub 0.5}Ce{sub 0.5}Mn{sub 1−x}TM{sub x}O{sub 3} (TM = Fe, Co; 0.0 ≤ x ≤ 0.1) manganites show semiconducting behavior. The thermopower measurements infer hole as charge carriers and electron–magnon as well spin wave fluctuation mechanism are effective at low temperature domain and SPC model fits the observed data at high temperature. The magnetic susceptibility measurement confirms a transition from paramagnetic to ferromagnetic phase. The observed peaks in the specific heat measurements, shifts to lower temperatures and becomes progressively broader with doping of transition metals on Mn-site. The thermal conductivity is measured in the temperature range of 10–350 K with a magnitude in between 10 and 80 mW/cm K.
- OSTI ID:
- 22285196
- Journal Information:
- Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 11 Vol. 48; ISSN MRBUAC; ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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