Quantum transitions, magnetization and thermal entanglement of the spin-1 Ising–Heisenberg diamond chain

• We consider the spin-1 Ising–Heisenberg model on a diamond chain.
• The ground-state phase diagrams are constructed.
• The existence of magnetization plateaus has been shown.
• Properties of the thermal entanglement are considered.

We consider the quasi-one dimensional spin-1 Ising–Heisenberg model with single-ion anisotropy on a diamond chain. Due to the exact solution of the model, we constructed the ground state phases which, alongside to others, have shown capability to exhibit most interesting frustrated state. The investigation of the magnetization processes showed enrichment of possibilities to form plateaus at zero, one- and two-thirds of the saturation magnetization. Negativity as a measure of the quantum entanglement is considered at low temperatures.