期刊
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY
卷 128, 期 1-3, 页码 30-33出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.mseb.2005.11.013
关键词
orthoferrite; structural distortion; magnetization
Samples of La1-xCaxFeO3 were synthesized in air for 0.05 <= x <= 0.55. X-ray powder diffraction analysis showed that the samples were formed in a single phased orthorhombic structure (Pbnm) where the lattice parameters were calculated and reported. The dc magnetic susceptibility was measured using Faraday's method from room temperature up to about 850 K at five different magnetic field intensities. The obtained results showed that the samples were antiferromagnetic with slight canting of the Fe3+ spins. The substitution of La3+ by Ca2+ ions lowers the Neel temperature. The calculated values of the effective magnetic moment as a function of the Ca2+ concentration were in good agreement with the reported data. The results were interpreted on the basis of the charge difference and the ionic radii of the La3+ and Ca2+ ions. (c) 2005 Elsevier B.V. All rights reserved.
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