Magnetocaloric properties of V6 molecular magnet

Abstract

The paper presents a theoretical study of magnetocaloric properties of polyoxovanadate molecular magnet V6 containing 6 vanadium ions carrying quantum spins $S=1/2$. The characteristic property of such structure is the presence of two weakly interacting spin triangles with all-antiferromagnetic couplings. The properties of the system are described using the exact numerical diagonalization approach applied to the quantum Heisenberg model and utilizing a field ensemble formalism. The dependence of the magnetic entropy and magnetic specific heat on the temperature and external magnetic field is calculated and extensively discussed. The magnetocaloric properties are quantified by isothermal entropy change and entropy derivative over the magnetic field. An interesting behaviour of isothermal entropy change is found, with high degree of tunability of the magnetocaloric effect with the initial and final magnetic field values.

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• Magnetocaloric effect in ${\mathrm{Cu}}_3$-type compounds using the Heisenberg antiferromagnetic model in a triangular ring
• Insights into nature of magnetization plateaus of a nickel complex [Ni4(CO3)2(aetpy)8](ClO4)4 from a spin-1 Heisenberg diamond cluster
• Coexistence of spontaneous dimerization and magnetic order in a transverse-field Ising ladder with four-spin interactions
• Molecular magnetism in the multi-configurational self-consistent field method
• Insight into magnetocaloric properties of Mn2Nb molecular magnet by relaxation calorimetry: A comprehensive case study
• Quantum machines using ${\mathrm{Cu}}_3$-like compounds modeled by Heisenberg antiferromagnetic in a triangular ring
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• Effect of Single-ion Anisotropy on Magnetocaloric Properties of Frustrated Spin-$s$ Ising Nanoclusters