Low Magnetic Field Magnetocaloric Effect in Gd 5 − x $\text {Gd}_{\mathrm {5-}_{x}}$ Eu x Ge 4

Hamad, Mahmoud A.

doi:10.1007/s10948-016-3445-y

Cited by 26 publications

(3 citation statements)

References 36 publications

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“…Research efforts, both experimental and theoretical, have been reported on the conventional MCE in the 3d transition elements at low and high fields, e.g., [14,16,18]. On the other hand, the anisotropic MCE (AMCE) is of interest because an increase in the entropy change could be achieved by rotating the crystal, along a specific crystalline direction, without changing the magnetic field intensity.…”

Section: Introductionmentioning

confidence: 99%

“…The application of magnetocaloric materials, either ordinary or anisotropic, in magnetic refrigeration has been the subject of many papers [14,[18][19][20][21][22][23]; in particular, search for materials with magneto-volume coupling and first-order phase transition is currently an active research area. Other applications of MCE materials are in the domain of medicine, e.g., in treating hyperthermia and in drug delivery [15,[24][25][26][27][28], where nanoparticles could be used.…”

Section: Introductionmentioning

confidence: 99%

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The Anisotropic Magnetocaloric Effect and Size-Dependent Magnetic Properties of Iron Particles

Halool

Aly

Yehia

et al. 2022

J Supercond Nov Magn

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We present a theoretical study on the anisotropic magnetocaloric effect and the size-dependent magnetic properties of Fe particles of radii in the range 25–150 Å. An observable increase has been found in the magnetization, of the low radii (25–75 Å) particles, by reducing the temperature to 4 K. The anisotropic isothermal change in entropy ΔSm has been calculated by taking the difference between maximum ΔSm along the easy [100] and hard [111] directions. The maximum anisotropic ΔSm is 0.015 J/kg K for a field change of 500 Oe along the [100] direction. The ΔSm temperature dependence exhibits a table-like plateau for small radii (25–75 Å) and in low fields below 300Oe. This enhances the relative cooling power (RCP) of the Fe element to be 8.11 J/kg for particles of 25 Å radius. Also, the calculation of anisotropic ΔTad was performed along the easy axis and showed an increase in the maximum value around 37% relative to the experimental conventional value.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Anisotropic Magnetocaloric Effect and Size-Dependent Magnetic Properties of Iron Particles

Halool

Aly

Yehia

et al. 2022

J Supercond Nov Magn

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“…There is an extensive research about the magnetocaloric effect (MCE) and nowadays the main goal of the MCE study is related to its potential for magnetic refrigeration in the ambient temperature and in cryogenic temperatures [1][2][3][4][5]. Magnetic refrigeration provides a promising solution for cooling [6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Simulated magnetocaloric properties of MnCr2O4 spinel

Hamad

2016

PAC

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The magnetocaloric properties of MnCr2O4 spinel have been simulated based on a phenomenological model. The simulation of magnetization as function of temperature is used to explore magnetocaloric properties such as magnetic entropy change, heat capacity change, and relative cooling power. The results imply the prospective application of MnCr2O4 spinel to achieve magnetocaloric effect at cryogenic temperatures (20-60K) near Curie temperatures (38-44K). According to the obtained results it is recommended that MnCr2O4 spinel can be used as a promising practical material in the active magnetic regenerator cycle that cools hydrogen gas.

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