| 一维亚铁磁无序混合自旋链的磁特性的Monte Carlo模拟 |
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| 引用本文： | 沈双娟,黄思川,蒋丽钦,黄志高.一维亚铁磁无序混合自旋链的磁特性的Monte Carlo模拟[J].福建师范大学学报(自然科学版),2007,23(5):44-49. |
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| 作者姓名： | 沈双娟 黄思川 蒋丽钦 黄志高 |
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| 作者单位： | 福建师范大学物理与光电信息科技学院,福建,福州,350007 |
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| 基金项目： | 国家自然科学基金
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福建省自然科学基金 |
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| 摘 要： | 基于一维自旋链模型,采用Monte Carlo方法模拟研究了具有反铁磁相互作用的自旋S-1和自旋S-3/2混合的亚铁磁系统的磁特性,重点研究了自旋的无序排列对此混合系统磁特性的影响.研究发现,基态时,当自旋S-1和自旋S-3/2交替混合(有序排列)时,系统存在M-H磁化曲线的阶梯效应;而当自旋S-1和自旋S-3/2无序混合时,系统的阶梯效应出现涨落,台阶甚至消失.最后,通过对系统自旋组态和能量的研究,解释了该混合系统中所产生的阶梯效应和相图.
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| 关 键 词： | 磁性 混合自旋系统 Monte Carlo 无序排列 |
| 文章编号： | 1000-5277（2007）05-0044-06 |
| 修稿时间： | 2006-09-06 |
Magnetic Properties of Mixed One-dimensional Ferrimagnetic Spin Chain with Spin in Random Array: Monte Carlo Simulation |
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| SHEN Shuang-juan,HUANG Si-chuan,JIANG Li-qin,HUANG Zhi-gao.Magnetic Properties of Mixed One-dimensional Ferrimagnetic Spin Chain with Spin in Random Array: Monte Carlo Simulation[J].Journal of Fujian Teachers University(Natural Science),2007,23(5):44-49. |
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| Authors: | SHEN Shuang-juan HUANG Si-chuan JIANG Li-qin HUANG Zhi-gao |
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| Institution: | School of Physics and OptoElectronics Technology, Fujian Normal University, Fuzhou 350007, China |
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| Abstract: | Based on Monte Carlo simulation,the magnetic properties of a mixed spin-1 and spin-3/2 ferrimagnetic systems on a one-dimensional spin chain are simulated.The influence of spins in random array on the magnetic properties of the mixed system is also studied in detail.The step effect of M-H magnetization curve is found in spin chains with the spin-1 and spin-3/2 mixed by turn(regular array).However,strong fluctuations appear and the step-like even disappears in spin chains with the spin-1 and spin-3/2 mixed by random array.Moreover,the magnetic plateaus of the systems have been explained well with the analysis of the energy and the spin configuration of the systems. |
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| Keywords: | magnetic property mixed spin system Monte Carlo random array |
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