Journal
CERAMICS INTERNATIONAL
Volume 44, Issue 13, Pages 14974-14979Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2018.05.124
Keywords
Substituted manganites; Neutron powder diffraction; Crystal structure; Magnetic properties; Conduction mechanism
Categories
Funding
- Vietnam Academy of Science and Technology under the project Utilization of neutron diffraction on IBR-2M pulse nuclear reactor for studying the crystal and magnetic structures of the composit materials under variable pressure and temperature [VAST.CTVL.01/17-20]
- Ministry of Education and Science of the Russian Federation [SUSU 4.1346.2017/4.6, P02-2017-2-4, K3-2017-059, K4-2017-041, 10.9639.2017/8.9, RFMEFI59417 x 0014]
- Act 211 Government of the Russian Federation [02.A03.21.0011]
- Russian Foundation for Basic Research [16-08-01043]
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The crystal and magnetic structures of La0.7Ca0.3Mn0.5Fe0.5O3 compound have been studied by neutron powder diffraction in the temperature range of 10-300 K. The magnetization and electrical resistivity measurements have been also performed in the temperature range of 5-300 K in magnetic fields up to 1 T. These experimental results indicate a formation of a complex magnetic state in which the long-range antiferromagnetic G-type phase coexists with the short-range ferromagnetic clusters. The electrical conductivity of La0.7Ca0.3Mn0.5Fe0.5O3 demonstrates an anomalous temperature behavior suggesting a switching between different states. The origin of the unconventional magnetic state, the mechanisms of the electrical conductivity, and correlation between magnetic and transport properties in this manganite have been discussed.
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