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Critical behavior and magnet effect simulation in La1-xTexMnO3 manganites.

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Title: Critical behavior and magnet effect simulation in La1-xTexMnO3 manganites.
Authors: Hsini, Mohamed1 (AUTHOR) mohamed.hsini.14@gmail.com, Kaouach, Houda2 (AUTHOR), Haouas, Amel3 (AUTHOR)
Source: Applied Physics A: Materials Science & Processing. Jun2025, Vol. 131 Issue 6, p1-10. 10p.
Subjects: Magnetic transitions, Critical exponents, Magnetocaloric effects, Landau theory, Magnetic fields, Magnetic entropy
Abstract: This study presents a detailed analysis of the critical behavior in Te-doped La1-xTexMnO3 (x = 0.05–0.2), highlighting the influence of doping on magnetic interactions and critical phenomena. A significant novelty of this work lies in the use of an iterative refinement of critical exponents via Modified Arrott Plots (MAPs) and the Kouvel–Fisher method, revealing a deviation from the mean-field-like universality class. The critical exponents values evolve with increasing Te concentration, underscoring the tunability of magnetic interactions through chemical doping. Additionally, numerical simulations were employed to reproduce magnetization isotherms, and observed discrepancies at low magnetic fields were attributed to thermodynamic fluctuation effects not captured by classical models. The magnetic entropy change, with a peak value of 3.8 J.kg-1·K-1 at 5 T for x = 0.1, was derived both via the Landau theory and Maxwell relation, showing excellent agreement. This work contributes a comprehensive framework for analyzing critical phenomena in manganites and demonstrates a pathway to engineer magnetic transitions via controlled doping. [ABSTRACT FROM AUTHOR]
Copyright of Applied Physics A: Materials Science & Processing is the property of Springer Nature 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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  Data: Critical behavior and magnet effect simulation in La<subscript>1-x</subscript>Te<subscript>x</subscript>MnO<subscript>3</subscript> manganites.
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  Data: <searchLink fieldCode="JN" term="%22Applied+Physics+A%3A+Materials+Science+%26+Processing%22">Applied Physics A: Materials Science & Processing</searchLink>. Jun2025, Vol. 131 Issue 6, p1-10. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Magnetic+transitions%22">Magnetic transitions</searchLink><br /><searchLink fieldCode="DE" term="%22Critical+exponents%22">Critical exponents</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetocaloric+effects%22">Magnetocaloric effects</searchLink><br /><searchLink fieldCode="DE" term="%22Landau+theory%22">Landau theory</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+fields%22">Magnetic fields</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+entropy%22">Magnetic entropy</searchLink>
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  Data: This study presents a detailed analysis of the critical behavior in Te-doped La1-xTexMnO3 (x = 0.05–0.2), highlighting the influence of doping on magnetic interactions and critical phenomena. A significant novelty of this work lies in the use of an iterative refinement of critical exponents via Modified Arrott Plots (MAPs) and the Kouvel–Fisher method, revealing a deviation from the mean-field-like universality class. The critical exponents values evolve with increasing Te concentration, underscoring the tunability of magnetic interactions through chemical doping. Additionally, numerical simulations were employed to reproduce magnetization isotherms, and observed discrepancies at low magnetic fields were attributed to thermodynamic fluctuation effects not captured by classical models. The magnetic entropy change, with a peak value of 3.8 J.kg-1·K-1 at 5 T for x = 0.1, was derived both via the Landau theory and Maxwell relation, showing excellent agreement. This work contributes a comprehensive framework for analyzing critical phenomena in manganites and demonstrates a pathway to engineer magnetic transitions via controlled doping. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Applied Physics A: Materials Science & Processing is the property of Springer Nature 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: 10.1007/s00339-025-08546-3
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      – Code: eng
        Text: English
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      – SubjectFull: Magnetic transitions
        Type: general
      – SubjectFull: Critical exponents
        Type: general
      – SubjectFull: Magnetocaloric effects
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      – SubjectFull: Landau theory
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      – SubjectFull: Magnetic fields
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      – SubjectFull: Magnetic entropy
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      – TitleFull: Critical behavior and magnet effect simulation in La1-xTexMnO3 manganites.
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            – D: 01
              M: 06
              Text: Jun2025
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              Y: 2025
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