https://doi.org/10.1051/epjconf/20147509005
Magnetocaloric properties of a frustrated Blume-Capel antiferromagnet
Department of Theoretical Physics and Astrophysics, Institute of Physics, P.J. Šafárik University in Košice, Park Angelinum 9, 041 54 Košice, Slovakia
a Corresponding author: milan.zukovic@upjs.sk
Published online: 3 July 2014
Low-temperature magnetization processes and magnetocaloric properties of a geometrically frustrated spin-1 Blume-Capel model on a triangular lattice are studied by Monte Carlo simulations. The model is found to display qualitatively different behavior depending on the sign of the single-ion anisotropy D. For positive values of D we observe two magnetization plateaus, similar to the spin-1/2 Ising antiferromagnet, and negative isothermal entropy changes for any field intensity. For a range of small negative values of D there are four magnetization plateaus and the entropy changes can be either negative or positive, depending on the field. If D is negative but large in absolute value then the entropy changes are solely positive.
© Owned by the authors, published by EDP Sciences, 2014
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