Critical Behavior Near the Paramagnetic to Ferromagnetic Phase Transition Temperature in Polycrystalline La0.57Nd0.1Sr0.33Mn1−xAlxO3 (0.0≤x≤0.1)

• Published in: Journal of superconductivity and novel magnetism 2012, Vol.25 (7), p.2109-2116
• Main Authors: Tka, E., Cherif, K., Dhahri, J., Dhahri, E., Hlil, E. K.
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Condensed Matter Physics; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Magnetic Materials; Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.); Magnetic properties and materials; Magnetically ordered materials: other intrinsic properties; Magnetism; Physics; Physics and Astronomy; Review Paper; Strongly Correlated Systems; Superconductivity
• ISSN: 1557-1939; 1557-1947
• DOI: 10.1007/s10948-012-1687-x

The critical parameters provide important information concerning the interaction mechanisms near the paramagnetic to ferromagnetic transition. In this paper, we have investigated the effect of non-magnetic aluminum Al doping in Mn-site on the critical behavior in La 0.57 Nd 0.1 Sr 0.33 MnO 3 compounds using magnetization methods near the Curie temperature T C through various techniques such as modified Arrott plot, Kouvel–Fisher method, and critical isotherm analysis. The values of critical exponents, derived from the magnetic data yield 0.326 ≤ β ≤0.366,1.265≤ γ ≤1.342 and 4.13 ≤ δ ≤5.07. The critical exponents found in this study obey the Widom scaling relation δ =1+ γ / β , implying that the obtained values of β and γ are reliable. Experimental results have revealed that the samples exhibited the second-order magnetic phase transition with exponents which match well with those predicted for the three-dimensional Heisenberg (3D) around the critical temperature.