Effects of the temperature dependence of the bulk modulus on magnetic exchange-entropy

Silva, J.A. da; Plaza, E.J.R.; Campoy, J.C.P.

doi:10.1016/j.jallcom.2015.01.151

Cited by 3 publications

(1 citation statement)

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“…The influence of external magnetic field on the lattice characteristics as well as the effect of the external pressure on the purely magnetic quantities are the manifestations of the magnetoelastic coupling. The phenomena emerging due to the mutual relations of magnetism and lattice properties were studied in numerous, general theoretical works [1][2][3][4][5][6][7][8][9][10][11][12]. Moreover, some special attention was paid to model ferromagnetic materials, such as gadolinium, which have shown further a high potential for applications in magnetocaloric refrigeration.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics of a model solid with magnetoelastic coupling

Szałowski

Balcerzak

Jaščur

2018

Journal of Magnetism and Magnetic Materials

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In the paper a study of a model magnetoelastic solid system is presented. The system of interest is a mean-field magnet with nearest-neighbour ferromagnetic interactions and the underlying s.c. crystalline lattice with the long-range Morse interatomic potential and the anharmonic Debye model for the lattice vibrations. The influence of the external magnetic field on the thermodynamics is investigated, with special emphasis put on the consequences of the magnetoelastic coupling, introduced by the power-law distance dependence of the magnetic exchange integral. Within the fully self-consistent, Gibbs energy-based formalism such thermodynamic quantities as the entropy, the specific heat as well as the lattice and magnetic response functions are calculated and discussed. To complete the picture, the magnetocaloric effect is characterized by analysis of the isothermal entropy change and the adiabatic temperature change in the presence of the external pressure.

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