Magnetic properties of a spin-1/2 Ising-Heisenberg Cairo pentagonal model
Year: 2019
Type: preprint
Abstract: In the present paper, the specific heat and magnetic property studies of a spin-1/2 Ising-Heisenberg Cairo pentagonal structure are reported. The model has been comprehensively investigated by F. C. Rodrigues {\it et al.} in Ref. \cite{Rodrigues} without external magnetic field. Here, we consider the mentioned Cairo pentagonal model in the presence of an external tunable magnetic field and examine the low-temperature magnetization process, as well as, the specific heat of the model by using the transfer matrix approach. We find that the model shows magnetization intermediate plateaus at zero and $\frac{1}{2}$ of the saturation magnetization accompanied with the growing single Schottky peak in the specific heat curve versus temperature. Each magnetization jump is in accordance with the merging of each two peaks of the specific heat curve when the magnetic field increases. This is reminiscent of the ground state phase transition from one plateau to one another. We also deduce that the magnetic field and the isotropic coupling constant considered for the dimers have substantial effects on the temperature dependence of the specific heat.
Source: arXiv (Cornell University)
Authors: Hamid Arian Zad, N. S. Ananikian
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2968092858