Landau mean-field analysis of magnetic entropy change and spontaneous magnetization estimation in Nd0.6Sr0.3K0.1MnO3 perovskite

2021 ◽  
Vol 127 (12) ◽  
Author(s):  
M. Jeddi ◽  
J. Massoudi ◽  
H. Gharsallah ◽  
Sameh I. Ahmed ◽  
E. Dhahri ◽  
...  
Keyword(s):  
Magnetic Entropy Change ◽  
Spontaneous Magnetization ◽  
Mean Field ◽  
Entropy Change ◽  
Field Analysis ◽  
Magnetic Entropy

scholarly journals Critical phenomena and estimation of the spontaneous magnetization from a mean field analysis of the magnetic entropy change in La0.7Ca0.1Pb0.2Mn0.95Al0.025Sn0.025O3

RSC Advances ◽  
2018 ◽  
Vol 8 (6) ◽  
pp. 3099-3107 ◽  
Author(s):  
Khadija Dhahri ◽  
N. Dhahri ◽  
J. Dhahri ◽  
K. Taibi ◽  
E. K. Hlil
Keyword(s):  
Critical Phenomena ◽  
Critical Behavior ◽  
Magnetic Entropy Change ◽  
Spontaneous Magnetization ◽  
Mean Field ◽  
Entropy Change ◽  
Field Analysis ◽  
Perovskite Manganite ◽  
Magnetic Entropy

In the present work, we have studied the universal critical behavior in the perovskite-manganite compound La0.7Ca0.1Pb0.2Mn0.95Al0.025Sn0.025O3.

Cryogenic Magnetocaloric Effect in Distorted Double-perovskite Gd2ZnTiO6

2021 ◽  
Author(s):  
Ziyu Yang ◽  
Jun-Yi Ge ◽  
Shuangchen Ruan ◽  
Hongzhi Cui ◽  
Yu-Jia Zeng
Keyword(s):  
Heat Capacity ◽  
Magnetic Entropy Change ◽  
Mean Field ◽  
Double Perovskite ◽  
Entropy Change ◽  
Field Analysis ◽  
Magnetic Entropy ◽  
Static Magnetization ◽  
Magnetocaloric Properties ◽  
Heat Capacity Measurements

Herein, we report on the magnetic and magnetocaloric properties of a distorted double-perovskite, Gd2ZnTiO6, through static magnetization, heat capacity measurements, and mean-field analysis. The most pronounced isothermal magnetic entropy change...

Magnetocaloric Effect in RFe10X2( X=Mo, V)

2018 ◽  
Vol 1 (1) ◽  
pp. 102-113
Author(s):  
Raghda Abu El-Nasr ◽  
Samy H. Aly ◽  
Sherif Yehia ◽  
Hala A. Sobh
Keyword(s):  
Heat Capacity ◽  
Magnetocaloric Effect ◽  
Magnetic Entropy Change ◽  
Mean Field ◽  
Entropy Change ◽  
Field Analysis ◽  
Electronic Contribution ◽  
Sublattice Model ◽  
Magnetic Entropy ◽  
Field Change

We present a mean-field study on the magnetocaloric effect (MCE) in RFe10X2, where X=Mo, V, and R=Gd, Tb, Ho, Tm, Dy, Er, Nd for X=V. For X=Mo, R=Dy, Gd, and Nd. The two-sublattice model, involving the 4f (rare earth) and 3d(Fe) sublattices, is used. For both systems, magnetization, magnetic heat capacity, magnetic entropy and isothermal entropy change ∆Sm are calculated for different magnetic fields in the 0-5T range and the temperature range from 0 to 700K. Direct and inverse MCEs are shown to take place in these ferromagnetic/ferrimagnetic compounds. For a field change ∆H=5T, the maximum isothermal magnetic entropy change has been calculated for ferromagnetic NdFe10Mo2 compound to be 6.6 J/K mol at Tc=441 K. Both direct, and inverse MCEs have been found in ferrimagnetic compounds, e.g., for TmFe10V2, with maximum -∆Sm= J/K mol at Tc=521K and ∆Sm=  J/K mol at TN=127 K. Mean-field analysis is suitable for handling the systems we report on. Further study on the lattice and electronic contribution to entropy is planned.

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