Zero temperature non-plateau magnetization and magnetocaloric effect in an Ising-XYZ diamond chain structure

Abstract

Zero temperature non-plateau magnetization is a peculiar property of a quantum spin chain and it sometimes appears due to different gyromagnetic factors. In this study, we illustrate a quite unusual nonplateau magnetization property driven by XY-anisotropy in an Ising-XYZ diamond chain. Two particles with spin-1/2 are bonded by XYZ coupling and they are responsible for the emergence of non-plateau magnetization. These two quantum operator spins are bonded to two nodal Ising spins and this process is repeated infinitely to yield a diamond chain structure. Due to the nonplateau magnetization property, we focus our discussion on the magnetocaloric effect of this model by presenting the isentropic curves and the Grüneisen parameters, as well as showing the regions where the model exhibits an efficient magnetocaloric effect. Due to the existence of two phases located very close to each other, the strong XY-anisotropy exhibits a particular behavior with a magnetocaloric effect, with a wider interval in the magnetic field, where the magnetocaloric effect is efficient.PACS numbers:

Quasi-phases and pseudo-transitions in one-dimensional models with nearest neighbor interactions

“…Most onedimensional models with short-range interaction have been extensively investigated in the last decade [11][12][13][14][15][16][17], whose transfer matrix have the following structure T = w 0 w 1 w 1 w 2 . Obviously, the corresponding eigenvalues are…”

“…Lattice sites for mobile electrons Figure 1: Schematic representation: (a) Ising-XYZ diamond chain model [16]. (b) Double-tetrahedral chain, with localized Ising spin regularly alternates with two mobile electrons delocalized over a triangular plaquette [17].…”

“…In addition, Honecker et al [10] investigated the thermodynamic properties of the Heisenberg model in a diamond chain structure. Furthermore, in the last decade, the thermodynamics of the Ising-Heisenberg model in diamond chains has also been widely discussed in references [11][12][13][14].Lately, several one-dimensional models have been investigated in the framework of decorated structures, particularly Ising and Heisenberg models with a variety of structures, such as the Ising-Heisenberg models in diamond chain structure [15,16] as shown in fig.1a, one-dimensional double-tetrahedral chain (see fig.1b Heisenberg spin Ising spinLattice sites for mobile electrons The analysis of the first derivative of the thermodynamic potential, such as entropy, internal energy, magnetization shows a significant jump as a function of temperature, maintaining a close similarity with the first order phase transition. Similarly, a second order derivative of potential thermodynamics, such as specific heat and magnetic susceptibility, resembles a typical second order phase transition at finite temperature.…”

“…Lately, several one-dimensional models have been investigated in the framework of decorated structures, particularly Ising and Heisenberg models with a variety of structures, such as the Ising-Heisenberg models in diamond chain structure [15,16] as shown in fig.1a, one-dimensional double-tetrahedral chain (see fig.1b …”

“…Lately, several one-dimensional models have been investigated in the framework of decorated structures, particularly Ising and Heisenberg models with a variety of structures, such as the Ising-Heisenberg models in diamond chain structure [15,16] as shown in fig.1a, one-dimensional double-tetrahedral chain (see fig.1b), in which the localized Ising spin regularly alternates with two mobile electrons delocalized over a triangular plaquette [17], alternating Ising-Heisenberg ladder model [18], Ising-Heisenberg triangular tube model [19]. * Electronic address: ors@dfi.ufla.br…”