Magnetocaloric Effect in Frustrated Magnetic Systems: From Bulk to Nano

Nair, Harikrishnan S.; El-Gendy, Ahmed A.

doi:10.1016/b978-0-12-813904-2.00008-5

Cited by 4 publications

(2 citation statements)

References 83 publications

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“…Additionally, in this series, investigation of magnetocaloric properties is given more priority as the geometrically frustrated spin glass materials can possess an excellent magnetocaloric effect. Presence of numerous degenerate magnetic ground states in zero external magnetic field, in contrast to the unique magnetic ground state found in materials with longrange magnetic transitions is a key factor contributing to the excellent magnetocaloric performance in frustrated magnetic materials [19]. Studies show that geometrically frustrated spin glass as well as long-range ordered materials of these series are good magnetic refrigerants for the liquefaction of gases like nitrogen, helium, and hydrogen [1,7,17].…”

Section: Introductionmentioning

confidence: 99%

Griffiths-like behavior and magnetocaloric properties of rare-earth silicide Tb₂Co_0.8Si_3.2

U D,

et al. 2024

J. Phys.: Condens. Matter

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Novel rare-earth silicide, Tb2Co0.8Si3.2 compound, crystallizes in the Lu2CoGa3 structure, a distorted substitution variant of the AlB2 structure. The compound exhibits a complex magnetic state, with a ferromagnetic transition at 58 K, followed by successive antiferromagnetic transitions at 24 K and 8 K, respectively. Isothermal and magnetic hysteresis studies indicate the prominence of competing antiferro and ferromagnetic interactions in the compound. However, this does not lead to the formation of spin glass behavior, as confirmed by AC magnetic susceptibility and heat capacity studies. In the paramagnetic state, the short-range ferromagnetic ordering of cobalt creates a Griffiths-like anomaly that is suppressed at higher magnetic fields. Investigation of magnetocaloric and magnetoresistance properties identifies the compound as a conventional second-order magnetocaloric material with negative magnetoresistance. Furthermore, the determination of Landau coefficients and subsequent analysis indicate that the isothermal entropy change of the compound can be calculated from these coefficients.

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Section: Introductionmentioning

confidence: 99%

Griffiths-like behavior and magnetocaloric properties of rare-earth silicide Tb₂Co_0.8Si_3.2

U D,

et al. 2024

J. Phys.: Condens. Matter

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“…A particularly interesting approach to treat SG systems with GF is the description of the problem in terms of spin clusters. Among other advantages, this approach also allows a direct connection between GF, disorder, molecular nanomagnetism [30] and MCE [31]. One way to achieve that is through the cluster spin glass mean-field theory [32,33].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of the magnetocaloric effect in geometrically frustrated cluster spin glass systems

Zimmer

Mourão

Schmidt

et al. 2023

J. Phys.: Condens. Matter

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In this work, we theoretically demonstrate that a strong enhancement of the Magnetocaloric Effect is achieved in geometrically frustrated cluster spin-glass systems just above the freezing temperature. We consider a network of clusters interacting randomly which havetriangular structure composed of Ising spins interacting antiferromagnetically. The intercluster disorder problem is treated using a cluster spin glass mean-field theory, which allows exact solution of the disordered problem. The intracluster part can be solved using exact enumeration. The coupling between the inter and intracluster problem incorporates the interplay between effects coming from geometric frustration and disorder. As a result, it is shown that there is the onset of cluster spin glass phase even with very weak disorder.Remarkably, it is exactly within a range of very weak disorder and small magnetic field that is observed the strongest isothermal release of entropy. 

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Magnetocaloric effect in spin-glass-like GdCu4Mn compound

Synoradzki

2022

Journal of Magnetism and Magnetic Materials

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Magnetocaloric Effect in Frustrated Magnetic Systems: From Bulk to Nano

Cited by 4 publications

References 83 publications

Griffiths-like behavior and magnetocaloric properties of rare-earth silicide Tb₂Co_0.8Si_3.2

Griffiths-like behavior and magnetocaloric properties of rare-earth silicide Tb₂Co_0.8Si_3.2

Enhancement of the magnetocaloric effect in geometrically frustrated cluster spin glass systems

Magnetocaloric effect in spin-glass-like GdCu4Mn compound

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Magnetocaloric Effect in Frustrated Magnetic Systems: From Bulk to Nano

Cited by 4 publications

References 83 publications

Griffiths-like behavior and magnetocaloric properties of rare-earth silicide Tb2Co0.8Si3.2

Griffiths-like behavior and magnetocaloric properties of rare-earth silicide Tb2Co0.8Si3.2

Enhancement of the magnetocaloric effect in geometrically frustrated cluster spin glass systems

Magnetocaloric effect in spin-glass-like GdCu4Mn compound

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Griffiths-like behavior and magnetocaloric properties of rare-earth silicide Tb₂Co_0.8Si_3.2

Griffiths-like behavior and magnetocaloric properties of rare-earth silicide Tb₂Co_0.8Si_3.2