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Thermal entanglement, magnetic and quadrupole moments properties of the mixedspin-1/2 and spin-1 Ising-Heisenberg model on a diamond chain are considered.Magnetization and quadrupole moment plateaus are observed for theantiferromagnetic couplings. Thermal negativity as a measure of quantumentanglement of the mixed spin system is calculated. Different behavior for thenegativity is obtained for the various values of Heisenberg dipolar andquadrupole couplings. The intermediate plateau of the negativity has beenobserved at absence of the single-ion anisotropy and quadrupole interactionterm. When dipolar and quadrupole couplings are equal there is a similarbehavior of negativity and quadrupole moment.

Entanglement, magnetic and quadrupole moments properties of the mixed spin Ising-Heisenberg diamond chain