Critical behavior near the ferromagnetic–paramagnetic phase transition in La0.65Eu0.05Sr0.3Mn1−xCrxO3 (x=0.10 and x=0.15)
| Autor: | R. Bellouz, E. Dhahri, E.K. Hlil, Mohamed Oumezzine |
|---|---|
| Přispěvatelé: | Laboratoire Physico-Chimie des Matériaux [Monastir], Faculté des Sciences de Monastir (FSM), Université de Monastir - University of Monastir (UM)-Université de Monastir - University of Monastir (UM), Magnétisme et Supraconductivité (MagSup), Institut Néel (NEEL), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), Laboratoire de Physique Appliquée, Université de Sfax - University of Sfax |
| Rok vydání: | 2015 |
| Předmět: |
[PHYS]Physics [physics]
Phase transition Materials science Condensed matter physics Condensed Matter Physics Manganite Electronic Optical and Magnetic Materials Paramagnetism Ferromagnetism Mean field theory Electrical and Electronic Engineering Arrott plot Critical exponent ComputingMilieux_MISCELLANEOUS Perovskite (structure) |
| Zdroj: | Physica B: Condensed Matter Physica B: Condensed Matter, Elsevier, 2015, 456, pp.93-99. ⟨10.1016/j.physb.2014.07.063⟩ |
| ISSN: | 0921-4526 |
| Popis: | The critical properties of perovskite manganite La 0.65 Eu 0.05 Sr 0.3 Mn 1− x Cr x O 3 ( x =0.10 and x =0.15) around the paramagnetic–ferromagnetic phase transition are investigated through various techniques such as the modified Arrott plot, Kouvel–Fisher method, and critical isotherm analysis. The experimental results have revealed that the samples exhibited the second-order magnetic phase transition and the critical exponents of β and γ for La 0.65 Eu 0.05 Sr 0.3 Mn 1− x Cr x O 3 ( x =0.10) are consistent with the prediction of the mean field model. Furthermore, the estimated critical exponents of La 0.65 Eu 0.05 Sr 0.3 Mn 1− x Cr x O 3 ( x =0.15) are close to those found out by the 3D-Heisenberg model. The magnetization–field–temperature M – H – T behaviors of all compounds at below and above T C were properly renormalized following the scaling of state equation M ( H , e ) = | e | β f ± ( H / | e | β + γ ) , where e = ( T − T C ) / T C , f + for T > T C and f − for T T C . This confirms that the obtained values of the critical exponent as well as T C are reasonably accurate and unambiguous. |
| Databáze: | OpenAIRE |
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