Magnetization distribution in a spin ladder-shaped quantum nanomagnet

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:469

Article

Szalowski, K.¹  Kowalewska, P.¹ 

[1] Univ Lodz, Dept Solid State Phys, Fac Phys & Appl Informat, Ulica Pomorska 149-153, PL-90236 Lodz, Poland

关键词: Magnetic cluster;    Nanomagnet;    Quantum spins;    Heisenberg model;    Magnetization distribution;    Spin ladder;   

DOI  :  10.1016/j.jmmm.2018.09.005

来源: Elsevier

【 摘 要 】

The quantum nanomagnets show interesting site-dependent magnetic properties as a function of the temperature and the external magnetic field. In the paper we present the results of calculations for a finite quantum spin ladder with two legs, consisting of 12 spins S = 1/2, with open ends. We describe our system with isotropic quantum Heisenberg model and perform exact numerical diagonalization of the Hamiltonian to use canonical ensemble approach. Our analysis focuses on the site-dependent magnetization in the system, presenting magnetization distributions for various interaction parameters. We discuss extensively the temperature and magnetic field dependences of individual site magnetizations. The interesting behaviour, with pronounced non-uniformity of magnetization across the ladder, is found.

【 授权许可】

Free