Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 638, Issue -, Pages 305-312Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2015.03.011
Keywords
Ferrite perovskite; Critical behavior; Curie temperature; Universality class
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Funding
- Tunisian Ministry of Higher Education and Scientific Research and Technology
- Higher Education, Scientific of French
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The critical properties of ferrite perovskite La0.8Ca0.2-xPbxFeO3 (x = 0.0, 0.1 and 0.2) compounds at the ferromagnetic-paramagnetic (FM-PM) transition have been analyzed. Experimental results revealed that all samples exhibit a second-order magnetic phase transition. The estimated critical exponents derived from the magnetic data using various techniques such as modified Arrott plot, Kouvel-Fisher method, and critical magnetization isotherms M (T-C, H). The critical exponent values for all samples are in a close agreement with those predicted for the mean-field theory. The reason for this behavior may be longrange interactions between spins in this system. (C) 2015 Elsevier B.V. All rights reserved.
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