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Curie Temperature and Magnetization of Finite Superlattice with Random Irregularities

100%
Maciejewski W., Reich W.
Acta Physica Polonica A
|
1994
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vol. 85
|
issue 2
469-473
EN
The Curie temperature and layer magnetization of ferromagnetic superlattices with random irregularities in modulation amplitude, thickness of layers and width of interdiffusion zones are studied in an extended version of the Kirkwood approximation. It is found that the increase of the deviation in the modulation amplitude gives rise to localized magnetism and the significant increase in the Curie temperature.
2
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Thermodynamics of Ising Ferromagnet Studied by the Real-Space Renormalization Group Method

81%
Reich W., Piotrkowska K., Esposito U., Caramico D'Auria A.
Acta Physica Polonica A
|
1993
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vol. 84
|
issue 2
275-278
EN
The critical exponents of the 3D Ising model were calculated in the approximation of the fourth-order cumulant expansion. Thermodynamic functions in the high-temperature range are obtained.
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