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Magnetic properties of perovskites La0.7Sr0.3[formula omitted][formula omitted]TixO3: Monte Carlo simulation versus experiments.

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Title: Magnetic properties of perovskites La0.7Sr0.3[formula omitted][formula omitted]TixO3: Monte Carlo simulation versus experiments.
Authors: Yahyaoui, Samia1 yahyaoui.samia@yahoo.fr, Kallel, Sami2 sami_kallel@yahoo.fr, Diep, H.T.3 diep@u-cergy.fr
Source: Journal of Magnetism & Magnetic Materials. Oct2016, Vol. 416, p441-448. 8p.
Subjects: Magnetic properties of perovskite, Lanthanum compounds, Monte Carlo method, Curie temperature, Phase transitions, Molecular interactions
Abstract: This work presents a Monte Carlo study of the phase transition in the perovskites La 0.7 Sr 0.3 Mn 0.7 3+ Mn 0.3- x 4+ Ti x O 3 ( x =0.1, 0.2, and 0.25). We take into account nearest-neighbor (NN) interactions between magnetic ions Mn 3+ ( S =2) and Mn 4+ ( S = 3 / 2 ) using a spin model describing a strong anisotropy on the z -axis. We have calculated the uniform and staggered magnetizations as well as the Edwards–Anderson order parameter as functions of temperature, with and without an applied magnetic field. Fitting the experimental Curie temperature at x =0, we estimated values of various exchange interactions in the system. The dominant one is that between Mn 3+ and Mn 4+ which is at the origin of the ferromagnetic ordering. Effects of the very small interaction J 2 between NN Mn 3+ is analyzed: we show that it can cause an antiferromagnetic phase above T c which disappears at smaller J 2 or at Mn 3+ concentrations smaller than 0.55. Our results show a good agreement with experiments on the magnetizations for substitution concentration x =0.1, 0.2 and 0.3. We also studied the applied-field effect on the magnetization and our obtained results are compared with experiments performed at x = 10 % . [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.)
Database: Engineering Source
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  Data: Magnetic properties of perovskites La0.7Sr0.3[formula omitted][formula omitted]TixO3: Monte Carlo simulation versus experiments.
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  Data: <searchLink fieldCode="AR" term="%22Yahyaoui%2C+Samia%22">Yahyaoui, Samia</searchLink><relatesTo>1</relatesTo><i> yahyaoui.samia@yahoo.fr</i><br /><searchLink fieldCode="AR" term="%22Kallel%2C+Sami%22">Kallel, Sami</searchLink><relatesTo>2</relatesTo><i> sami_kallel@yahoo.fr</i><br /><searchLink fieldCode="AR" term="%22Diep%2C+H%2ET%2E%22">Diep, H.T.</searchLink><relatesTo>3</relatesTo><i> diep@u-cergy.fr</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Magnetism+%26+Magnetic+Materials%22">Journal of Magnetism & Magnetic Materials</searchLink>. Oct2016, Vol. 416, p441-448. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Magnetic+properties+of+perovskite%22">Magnetic properties of perovskite</searchLink><br /><searchLink fieldCode="DE" term="%22Lanthanum+compounds%22">Lanthanum compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Monte+Carlo+method%22">Monte Carlo method</searchLink><br /><searchLink fieldCode="DE" term="%22Curie+temperature%22">Curie temperature</searchLink><br /><searchLink fieldCode="DE" term="%22Phase+transitions%22">Phase transitions</searchLink><br /><searchLink fieldCode="DE" term="%22Molecular+interactions%22">Molecular interactions</searchLink>
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  Data: This work presents a Monte Carlo study of the phase transition in the perovskites La 0.7 Sr 0.3 Mn 0.7 3+ Mn 0.3- x 4+ Ti x O 3 ( x =0.1, 0.2, and 0.25). We take into account nearest-neighbor (NN) interactions between magnetic ions Mn 3+ ( S =2) and Mn 4+ ( S = 3 / 2 ) using a spin model describing a strong anisotropy on the z -axis. We have calculated the uniform and staggered magnetizations as well as the Edwards–Anderson order parameter as functions of temperature, with and without an applied magnetic field. Fitting the experimental Curie temperature at x =0, we estimated values of various exchange interactions in the system. The dominant one is that between Mn 3+ and Mn 4+ which is at the origin of the ferromagnetic ordering. Effects of the very small interaction J 2 between NN Mn 3+ is analyzed: we show that it can cause an antiferromagnetic phase above T c which disappears at smaller J 2 or at Mn 3+ concentrations smaller than 0.55. Our results show a good agreement with experiments on the magnetizations for substitution concentration x =0.1, 0.2 and 0.3. We also studied the applied-field effect on the magnetization and our obtained results are compared with experiments performed at x = 10 % . [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  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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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.jmmm.2016.05.037
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      – Code: eng
        Text: English
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        PageCount: 8
        StartPage: 441
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      – SubjectFull: Magnetic properties of perovskite
        Type: general
      – SubjectFull: Lanthanum compounds
        Type: general
      – SubjectFull: Monte Carlo method
        Type: general
      – SubjectFull: Curie temperature
        Type: general
      – SubjectFull: Phase transitions
        Type: general
      – SubjectFull: Molecular interactions
        Type: general
    Titles:
      – TitleFull: Magnetic properties of perovskites La0.7Sr0.3[formula omitted][formula omitted]TixO3: Monte Carlo simulation versus experiments.
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            NameFull: Yahyaoui, Samia
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            NameFull: Kallel, Sami
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            NameFull: Diep, H.T.
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              Text: Oct2016
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              Y: 2016
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