Acta Mechanica Slovaca 2015, 19(3):46-53 | DOI: 10.21496/ams.2015.023

Magnetocaloric Effect in the Symmetric Spin-1/2 Diamond Chain with Different Landé g - factors of the Ising and Heisenberg Spins

Lucia Gálisová*
Department of Applied Mathematics and Informatics, Faculty of Mechanical Engineering, Technical University of Košice, Letná 9, 042 00 Košice, Slovak Republic

The symmetric spin-1/2 Ising-Heisenberg diamond chain with different Landé g-factors of the Ising and Heisenberg spins is exactly solved by combining the generalized decoration-iteration transformation and transfer-matrix method. The ground state of the system and the magnetocaloric effect during the adiabatic (de)magnetization are particularly examined. It is evidenced that the considered mixed-spin diamond chain exhibits the enhanced magnetocaloric effect during the adiabatic (de)magnetization in the vicinity of field-induced phase transitions as well as in the zero-field limit when the frustrated phase constitutes the zero-field ground state. The cooling efficiency of the system depends on whether it is macroscopically degenerate in these parameter regions or not.

Keywords: Ising-Heisenberg diamond chain; magnetocaloric effect; Landé g-factor; decoration-iteration transformation; exact results

Published: October 31, 2015  Show citation

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Gálisová, L. (2015). Magnetocaloric Effect in the Symmetric Spin-1/2 Diamond Chain with Different Landé g - factors of the Ising and Heisenberg Spins. Acta Mechanica Slovaca, 19(3), 46-53. doi: 10.21496/ams.2015.023
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