Critical Exponent Analysis and Evidence of Long-Range Ferromagnetic Order in Lightly Pr-Doped Nanocrystalline (La1-xPrx)0.67Ba0.33MnO3 (x = 0.15 and 0.22) Manganites
| Autor: | E.K. Hlil, Ma. Oumezzine |
|---|---|
| Přispěvatelé: | Université de Monastir - University of Monastir (UM), Magnétisme et Supraconductivité (MagSup), Institut Néel (NEEL), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA) |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Condensed matter physics Exchange interaction Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Nanocrystalline material 010305 fluids & plasmas Magnetization Ferromagnetism 0103 physical sciences [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] Curie temperature General Materials Science 010306 general physics Arrott plot Critical exponent ComputingMilieux_MISCELLANEOUS Perovskite (structure) |
| Zdroj: | Journal of Low Temperature Physics Journal of Low Temperature Physics, Springer Verlag (Germany), 2020, 201 (3-4), pp.406-417. ⟨10.1007/s10909-020-02505-3⟩ |
| ISSN: | 1573-7357 0022-2291 |
| DOI: | 10.1007/s10909-020-02505-3 |
| Popis: | We investigate the effect of lightly Pr3+ doping ions on the critical behavior of (La1-xPrx)0.67Ba0.33MnO3 (x = 0.15–0.22) perovskite synthesized by the modified sol–gel Pechini method. The obtained critical exponents (beta, gamma and delta) have been investigated by measuring the magnetization around the Curie temperature, TC. Based on the modified Arrott plot and Kouvel–Fisher techniques, scaling hypothesis, and critical isotherm analysis, we have determined the critical exponent values characteristic of magnetic order of (La1-xPrx)0.67Ba0.33MnO3 (x = 0.15–0.22), with β = 0.55–0.49, γ = 1.06–1.01, and δ = 2.702–3.299. These values indicate that the magnetic order due to lightly Pr3+ doping exhibits long-range ferromagnetic ordering. This fact is in good agreement with the mean-field model. In addition, the exchange interaction is obtained as J(r) ~ r4.56 and ~ r4.49 for 15-at. % Pr and 22-at., respectively. We argue that the range of interaction extends beyond the nearest neighbors. |
| Databáze: | OpenAIRE |
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