Magnetizaition plateau of the compound K₃Cu₃AlO₂(SO₄)₄

Using the density matrix renormalization group method of the spin 1/2 magnetic behavior of the compound K₃Cu₃AlO₂(SO₄)₄, which represents the physical realization of the diamond chain, was studied. For the values J₁ = J₃ = 132K, J₂ = 336K of coupling constants we obtained the magnetization plateau in the region 50-300 T of the external magnetic field. We used the ALPS (Algorithms and Libraries for Physics Simulations) library for the numerical calculations.