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Monte Carlo simulations on magnetic behavior of a spin-chain system in triangular lattice doped with antiferromagnetic bonds |
| YAO Xiao-yan, LI Peng-lei, DONG Shuai, LIU Jun-ming |
| Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China; International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, China; |
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Abstract A three-dimensional Ising-like model doped with anti-ferromagnetic (AFM) bonds is proposed to investigate the magnetic properties of a doped triangular spin-chain system by using a Monte-Carlo simulation. The simulated results indicate that a steplike magnetization behavior is very sensitive to the concentration of AFM bonds. A low concentration of AFM bonds can suppress the stepwise behavior considerably, in accordance with doping experiments on Ca3Co2O6. The analysis of spin snapshots demonstrates that the AFM bond doping not only breaks the ferromagnetic ordered linear spin chains along the hexagonal c-axis but also has a great influence upon the spin configuration in the ab-plane.
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Issue Date: 05 March 2007
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