| 外场作用下稀疏晶场分布和对称晶场分布的BC模型相变特点研究 |
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| 引用本文： | 朱海霞,晏世雷.外场作用下稀疏晶场分布和对称晶场分布的BC模型相变特点研究[J].江西师范大学学报(自然科学版),2011,35(1):70-73. |
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| 作者姓名： | 朱海霞 晏世雷 |
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| 作者单位： | 1. 盐城师范学院物理科学与电子技术学院,江苏,盐城,224002
2. 苏州大学物理科学与技术学院,江苏,苏州,215006 |
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| 基金项目： | 江苏省高等学校自然科学重点基金 |
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| 摘 要： | 在有效场框架下,运用切断近似的方法,对有外场作用的Blume-Capel模型的相图进行研究,探讨外场对2种晶场分布形式(稀疏晶场分布和对称晶场分布)的BC模型相图的影响,并给出相应的相图.在晶场稀疏分布情况下,外场的存在,系统的三临界点(TCP)存在的晶场稀疏浓度范围变大;有序相的区域变大;系统基态晶场简并模式数减小.而对于对称晶场分布情况,外场的存在,三临界点存在的晶场随机浓度范围和系统基态晶场简并模式均没有发生变化.
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| 关 键 词： | 相变 Blume-Capel模型 三临界点 外场 |
The Study on Phase Transition Properties of BC Model with Diluted Crystal Field and Symmetry Crystal Field in an External Magnetic Field |
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| ZHU Hai-xia,YAN Shi-lei.The Study on Phase Transition Properties of BC Model with Diluted Crystal Field and Symmetry Crystal Field in an External Magnetic Field[J].Journal of Jiangxi Normal University (Natural Sciences Edition),2011,35(1):70-73. |
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| Authors: | ZHU Hai-xia YAN Shi-lei |
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| Institution: | ZHU Hai-xia1,YAN Shi-lei 2(1.Department of Physics,Yancheng Teachers College,Yancheng Jiangsu 224002,China,2.Department of Physics,Suzhou University,Suzhou Jiangsu 215006,China) |
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| Abstract: | By using a cutting approximation,the phase transition properties of the Blume-Capel model(BCM) in an external magnetic field have been studied within the framework of an effective field theory.We discuss in detail the influence of external magnetic field on the phase diagram of BC model with two kinds of the random crystal field(with diluted crystal field and symmetry crystal field),and phase diagrams are given.Under crystal field dilu-tion condition,when the external magnetic field existed,the range of cry... |
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| Keywords: | phase transition Blume-Capel model tricritical point external magnetic field |
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