Modeling the Magnetocaloric Effect of La0.67Pb0.33MnO3 by the Mean-Field Theory

Hsini, Mohamed; Khadhraoui, S.; Zaidi, N.; Alrowaili, Z.A.

doi:10.1007/s10948-018-4644-5

Cited by 7 publications

(1 citation statement)

References 21 publications

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“…Some models analyze the MCE using different methods. Recently, the properties of MCE were studied by several theoretical methods, namely, mean-field theory (MFT) [20][21][22][23][24][25][26][27], effective-field theory (EFT) [28][29][30][31][32][33], Monte Carlo (MC) simulation [34][35][36][37][38][39] and first-principles calculations [40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Theoretical analysis of magnetic properties and the magnetocaloric effect using the Blume-Capel model

Oliveira¹,

Morais²,

Santos³

et al. 2022

Condens. Matter Phys.

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This work investigates the magnetic properties and the magnetocaloric effect in the spin-1 Blume-Capel model. The study was carried out using the mean-field theory from the Bogoliubov inequality to obtain the expressions of free energy, magnetization and entropy. The magnetocaloric effect was calculated from the variation of the entropy obtained by the mean-field theory. Due to the dependence on the external magnetic field and the anisotropy included in the model, the results for the magnetocaloric effect provided the system with first-order and continuous phase transitions. To ensure the results, the Maxwell relations were used in the intervals where the model presents continuous variations in magnetization and the Clausius-Clapeyron equation in the intervals where the model presents discontinuity in the magnetization. The methods and models for the analysis of a magnetic entropy change and first-order and continuous magnetic phase transitions, such as mean-field theory and the Blume-Capel model, are useful tools in understanding the nature of the magnetocaloric effect and its physical relevance.

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Section: Introductionmentioning

confidence: 99%

Theoretical analysis of magnetic properties and the magnetocaloric effect using the Blume-Capel model

Oliveira¹,

Morais²,

Santos³

et al. 2022

Condens. Matter Phys.

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Structural, magnetic and magnetocaloric properties, and analysis of MCE using the mean-field theory of Mg–Co ferrite with Ni substitution

Hcini

Dhahri

Zemni

et al. 2019

J Mater Sci: Mater Electron

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Structural Analysis and Theoretical Investigations of the Magnetocaloric Effect for La0.7Ba0.15Ag0.15MnO3 Manganite Prepared Using Sol-Gel Route

Hcini

Hsini

Robei

et al. 2020

J Supercond Nov Magn

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Structural analysis, magnetocaloric properties, and theoretical investigations of the magnetocaloric effect were carried out in the crystalline La0.7Ba0.15Ag0.15MnO3 manganite prepared using sol-gel route. The phase purity and structure of this sample were checked by X-ray diffraction technique and Rietveld analysis. From magnetic measurements, the ferromagnetic to paramagnetic (FM-PM) phase transition was observed around TC= 255 K.The maximum change in magnetic entropy (∆𝑆 𝑀 𝑚𝑎𝑥 ) and relative cooling power (RCP)extracted from magnetic measurements were 3.48 J×kg-1×K -1 and 225 J×kg -1 at an applied magnetic field of 5 T. These magnetocaloric parameters offer to the sample the possible use in the magnetic refrigeration technology. The magnetic-entropy simulation by using different theories such as the Weiss molecular mean-field theory and the Landau theory shows good correlation between the theoretical values of -∆SM(T) and the experimental ones estimated from Maxwell relation.

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Modeling the Magnetocaloric Effect of La0.67Pb0.33MnO3 by the Mean-Field Theory

Cited by 7 publications

References 21 publications

Theoretical analysis of magnetic properties and the magnetocaloric effect using the Blume-Capel model

Theoretical analysis of magnetic properties and the magnetocaloric effect using the Blume-Capel model

Structural, magnetic and magnetocaloric properties, and analysis of MCE using the mean-field theory of Mg–Co ferrite with Ni substitution

Structural Analysis and Theoretical Investigations of the Magnetocaloric Effect for La0.7Ba0.15Ag0.15MnO3 Manganite Prepared Using Sol-Gel Route

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