Critical behavior in Ag-doped managnites La<subscript>0.67</subscript>Pb<subscript>0.33−x </subscript>Ag<subscript> x </subscript>MnO<subscript>3</subscript> (x=0.1 and 0.15).
In: Journal of Magnetism & Magnetic Materials, Jg. 345 (2013-11-01), S. 118-124
Online
academicJournal
Zugriff:
Abstract: The critical behavior of the La0.67Pb0.33−x Ag x MnO3 (x=0.1 and 0.15) was investigated by measurement of the magnetization around the Curie temperature T C . Experimental results revealed that these samples exhibit a second-order magnetic phase transition. The magnetic data were analyzed in the critical region using the Kouvel–Fisher method to yield the critical exponents of 0.352≤β≤0.357 (from the temperature dependence of the spontaneous magnetization below T C ), 1.272≤γ≤1.346 (from the temperature dependence of the inverse initial susceptibility above T C ) and 4.563≤δ≤4.82 (from the critical magnetization isotherm M(T C , H)) with a T C of 288.37–316.39K. The critical exponents values for La0.67Pb0.23Ag0.1MnO3 are very close to those found out by the 3D-Heisenberg model (β=0.36, γ=1.39 and δ=4.8). Moreover, the estimated critical exponents of La0.67Pb0.18Ag0.15MnO3 are consistent with the prediction of the 3D-Ising model (β=0.325, γ=1.241 and δ=4.82). [Copyright &y& Elsevier]
Titel: |
Critical behavior in Ag-doped managnites La<subscript>0.67</subscript>Pb<subscript>0.33−x </subscript>Ag<subscript> x </subscript>MnO<subscript>3</subscript> (x=0.1 and 0.15).
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Autor/in / Beteiligte Person: | Mtiraoui, Naima ; Dhahri, Jemai ; Oumezine, Mohamed |
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Zeitschrift: | Journal of Magnetism & Magnetic Materials, Jg. 345 (2013-11-01), S. 118-124 |
Veröffentlichung: | 2013 |
Medientyp: | academicJournal |
ISSN: | 0304-8853 (print) |
DOI: | 10.1016/j.jmmm.2013.06.034 |
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