Calculation model on magnetocaloric effect (MCE) and relative cooling power (RCP) in composite materials at room temperature

Hafidi, Mohamed El; Boubekri, A.

doi:10.1016/j.jmmm.2017.10.083

Cited by 7 publications

(2 citation statements)

References 16 publications

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“…9(a). A similar effect has been observed in composites, [37] magnetic multilayer with antiferromagnetic interlayers [38] and other materials. [39] Finally note that for higher negative D, the system becomes ferrimagnetic (Fig.…”

Section: Magnetocaloric Responsessupporting

confidence: 80%

Magnetocaloric Effect in Anisotropic Mixed Spin 12 –1 System: Pair Approximation Method

Boubekri¹,

Hafidi²,

Hafidi³

2019

Commun. Theor. Phys.

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We use the Pair Approximation method to analyze the magnetic and magnetocaloric behaviors of diluted mixed spin SA = 1 and spin SB = 1/2 with the anisotropic Heisenberg model, on a cubic lattice with coordination number z=6. Our system is described in presence of an external magnetic field; the phase diagram and thermodynamic properties related to the concentration of magnetic atom (A or B) and the single ion anisotropy are constructed and discussed. Special attention is paid to magnetocaloric properties provided by isothermal entropy change as well as the cooling capacity. These cooling power keys are plotted and discussed as a function of interaction anisotropy and magnetic component concentration of two sublattices ions A and B. Numerical results show a double peak structure in the entropy change curve and the inverse magnetocaloric effect related to the presence of the negative single-ion anisotropy.

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Section: Magnetocaloric Responsessupporting

confidence: 80%

Magnetocaloric Effect in Anisotropic Mixed Spin 12 –1 System: Pair Approximation Method

Boubekri¹,

Hafidi²,

Hafidi³

2019

Commun. Theor. Phys.

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“…It is clear that the strength of the field-induced demagnetization is enhanced in the case of the F/f/F trilayer system, both with and without long-range exchange taken into account, compared to the case of the bulk alloy (thick film). Estimating potential MCE efficiency of the proximity-enhanced material versus that of the bulk spacer alloy, we note that the ratio of areas under ∆m of the respective materials is proportional to the ratio of their RCP [48]. This means that the RCP of the proximity-enhanced spacer (simulated with long-range exchange) can be up to two orders of magnitude higher than that of its constituent material.…”

Section: Numerical Simulationsmentioning

confidence: 97%

Magnetocaloric effect in multilayers studied by membrane-based calorimetry

Kulyk

Persson

Polishchuk

et al. 2022

J. Phys. D: Appl. Phys.

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We study magnetic multilayers, incorporating dilute ferromagnetic spacers between strongly-ferromagnetic layers exhibiting a proximity-enhanced magnetocaloric effect. Using magnetometry and direct measurements of the adiabatic temperature change based on a nanomembrane-calorimetry, we find that the magnetocaloric effect in the studied multilayer is indeed enhanced compared to that in the bulk spacer material. We develop a phenomenological numerical model of the studied trilayer and find that a long-range exchange interaction through the weakly-ferromagnetic spacer is required to adequately describe the magnetic and magnetocaloric properties of the system.

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Phase separation and combination of negative and positive magnetocaloric effects in Mn3Ga1−xAxC (A = Sn, Ge, Y)

Yan

Wang

Chen

2023

Journal of Alloys and Compounds

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Calculation model on magnetocaloric effect (MCE) and relative cooling power (RCP) in composite materials at room temperature

Cited by 7 publications

References 16 publications

Magnetocaloric Effect in Anisotropic Mixed Spin 12 –1 System: Pair Approximation Method

Magnetocaloric Effect in Anisotropic Mixed Spin 12 –1 System: Pair Approximation Method

Magnetocaloric effect in multilayers studied by membrane-based calorimetry

Phase separation and combination of negative and positive magnetocaloric effects in Mn3Ga1−xAxC (A = Sn, Ge, Y)

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