Magnetization Plateaus, Susceptibility, Specific Heat and Entanglement in Low Dimensional Spin Systems

Abstact:

The lecture will be devoted to the investigation of magnetization plateaus, magnetic susceptibility, specific heat and thermal entanglement for antiferromagnetic and ferromagnetic low dimensional spin systems. In the first part of the talk we will discuss the magnetization plateaus, susceptibility, specific heat and thermal concurrence on the exactly solvable symmetric spin-1/2 and mixed-spin Ising-Heisenberg models on double sawtooth ladder with multiple-spin interaction exchanges. The second part of the lecture will be devoted to the investigation of superstable cycles, magnetization plateau and susceptibility within the dynamical technique for the antiferromagnetic and ferromagnetic spin-1 Ising-Heisenberg models. This model can be used to describe the Ni-containing homo-metallic magnetic complex [Ni3(C4H2O4)2(μ3 − OH)2(H2O)4]n ・(2H 2O)n at low temperatures. In the last part of talk we study the Ni-containing polymer [Ni(NN’-dmen)(μ-N3)2]n. In this polymer there are the antiferromagnetic coupling corresponding to the end-to-end (EE) coordination mode and ferromagnetic couplings corresponding to the end-on (EO) coordination mode which generates magnetization plateaus and leads to the interesting behavior of specific heat, susceptibility and thermal negativity at low temperatures.