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Modeling the magnetic isotherms of (La0.56Ce0.14)Sr0.30MnO3 by a mean-field scaling method and estimation of magnetic entropy change.

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Title: Modeling the magnetic isotherms of (La0.56Ce0.14)Sr0.30MnO3 by a mean-field scaling method and estimation of magnetic entropy change.
Authors: Yahyaoui, S.1, Khalfaoui, M.1 mohamed_khalfaoui@yahoo.com, Kallel, S.2, Kallel, N.2,3, Amaral, J.S.4,5, Ben Lamine, A.1
Source: Journal of Magnetism & Magnetic Materials. Nov2015, Vol. 393, p105-109. 5p.
Subjects: Magnetic properties of lanthanum strontium manganese oxide, Mean field theory, Magnetic entropy, Perovskite, Equations of state
Abstract: We report a study on the magnetic properties of the (La 0.56 Ce 0.14 )Sr 0.30 MnO 3 perovskite, by a mean-field method. By scaling of the experimental magnetization data, the mean-field exchange parameter λ and the B S function of the equation of state B S [ ( H + H exch ) / T ] are directly determined, as well as the order of the phase transition. The spin quantum number of the manganite has been also determined. The mean-field scaling has been used to estimate magnetic entropy change ( − Δ S M ) within the thermodynamics of the model and without using the usual numerical integration of a Maxwell relation. The maxima of the positive absolute value of ( − Δ S M ) upon variation of the applied magnetic field at 1 and 5 T are about 1.68 and 5.04 J kg −1 K −1 , respectively. Satisfactory agreement between the mean-field model and experimental behavior has been found. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Magnetism & Magnetic Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 103724193
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  Data: Modeling the magnetic isotherms of (La0.56Ce0.14)Sr0.30MnO3 by a mean-field scaling method and estimation of magnetic entropy change.
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Magnetism+%26+Magnetic+Materials%22">Journal of Magnetism & Magnetic Materials</searchLink>. Nov2015, Vol. 393, p105-109. 5p.
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  Data: <searchLink fieldCode="DE" term="%22Magnetic+properties+of+lanthanum+strontium+manganese+oxide%22">Magnetic properties of lanthanum strontium manganese oxide</searchLink><br /><searchLink fieldCode="DE" term="%22Mean+field+theory%22">Mean field theory</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+entropy%22">Magnetic entropy</searchLink><br /><searchLink fieldCode="DE" term="%22Perovskite%22">Perovskite</searchLink><br /><searchLink fieldCode="DE" term="%22Equations+of+state%22">Equations of state</searchLink>
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  Data: We report a study on the magnetic properties of the (La 0.56 Ce 0.14 )Sr 0.30 MnO 3 perovskite, by a mean-field method. By scaling of the experimental magnetization data, the mean-field exchange parameter λ and the B S function of the equation of state B S [ ( H + H exch ) / T ] are directly determined, as well as the order of the phase transition. The spin quantum number of the manganite has been also determined. The mean-field scaling has been used to estimate magnetic entropy change ( − Δ S M ) within the thermodynamics of the model and without using the usual numerical integration of a Maxwell relation. The maxima of the positive absolute value of ( − Δ S M ) upon variation of the applied magnetic field at 1 and 5 T are about 1.68 and 5.04 J kg −1 K −1 , respectively. Satisfactory agreement between the mean-field model and experimental behavior has been found. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Group: Ab
  Data: <i>Copyright of Journal of Magnetism & Magnetic Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.jmmm.2015.05.044
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      – Code: eng
        Text: English
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        PageCount: 5
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      – SubjectFull: Magnetic properties of lanthanum strontium manganese oxide
        Type: general
      – SubjectFull: Mean field theory
        Type: general
      – SubjectFull: Magnetic entropy
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      – SubjectFull: Perovskite
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      – SubjectFull: Equations of state
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      – TitleFull: Modeling the magnetic isotherms of (La0.56Ce0.14)Sr0.30MnO3 by a mean-field scaling method and estimation of magnetic entropy change.
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              Text: Nov2015
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