Quantum phase transitions play a key role in the understanding the phenomena of many-body systems, especially in anti-ferromagnetic magnetic plateaus. Thermal entanglement properties in spin-1/2 and spin-1 can be experimentally detected by magnetic susceptibility. The thermal concurrence properties researching of experimental Cu-containing compounds can be observed in diamond chains and polymers. Thermal negativity as a measure of the quantum entanglement is considered in spin-1 Ni-containing complexes.