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Critical behavior and magnetocaloric effect of Ba2-xAxFeMoO6 (A = Sm, Ag, x = 0.0, 0.025) simulated by Landau theory.

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Title: Critical behavior and magnetocaloric effect of Ba2-xAxFeMoO6 (A = Sm, Ag, x = 0.0, 0.025) simulated by Landau theory.
Authors: Ghorbani, Zahra1 (AUTHOR), Ehsani, Mohammad Hossein1 (AUTHOR) Ehsani@semnan.ac.ir, Hsini, Mohamed2 (AUTHOR), Ji, Pengyu3,4 (AUTHOR), Zhang, Yingde5 (AUTHOR), Piao, Hong-Guang3,4 (AUTHOR)
Source: Applied Physics A: Materials Science & Processing. Jun2025, Vol. 131 Issue 6, p1-9. 9p.
Subjects: Landau theory, Critical exponents, Perovskite, Magnetocaloric effects, Magnetic entropy
Abstract: In this study, the magnetocaloric effect of Ba2-xAxFeMoO6 (A = Sm, Ag and x = 0.0, 0.025) has been modeled. The samples exhibit a second-order transition from ferromagnetic (FM) to paramagnetic (PM) states at transition temperatures (TC) of approximately 310 K, 322 K, and 304 K for the Ba2FeMoO6 (BFMO), Ba1.975Ag0.025FeMoO6 (BAFMO), and Ba1.975Sm0.025FeMoO6 (BSFMO) samples, respectively. Investigation the magnetocaloric effect (MCE) in these samples involved simulating the change in magnetic entropy (− ΔSM). The critical exponents, β, γ, and δ were obtained using a numerical method grounded in Landau free energy within the mean-field approximation; the simulated outcomes strongly correlate with the experimental data. [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: <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, p1-9. 9p.
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  Data: In this study, the magnetocaloric effect of Ba2-xAxFeMoO6 (A = Sm, Ag and x = 0.0, 0.025) has been modeled. The samples exhibit a second-order transition from ferromagnetic (FM) to paramagnetic (PM) states at transition temperatures (TC) of approximately 310 K, 322 K, and 304 K for the Ba2FeMoO6 (BFMO), Ba1.975Ag0.025FeMoO6 (BAFMO), and Ba1.975Sm0.025FeMoO6 (BSFMO) samples, respectively. Investigation the magnetocaloric effect (MCE) in these samples involved simulating the change in magnetic entropy (− ΔSM). The critical exponents, β, γ, and δ were obtained using a numerical method grounded in Landau free energy within the mean-field approximation; the simulated outcomes strongly correlate with the experimental data. [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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              Text: Jun2025
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