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Li Liang-Sheng; Li Li; Chen Xiao-Song; Li, LS , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China
Characterization of Phase Transition in Heisenberg Fluids from Density Functional Theory
Source PublicationCOMMUNICATIONS IN THEORETICAL PHYSICS
KeywordOrder-disorder Transition Liquid-vapor Interface Monte-carlo-simulation Neutral Hard-spheres Dipolar Fluids Model Instability Equation Diagram
AbstractThe phase transition of Heisenberg fluid has been investigated with the density functional theory in mean-field approximation (MF). The matrix of the second derivatives of the grand canonical potential Omega with respect to the particle density fluctuations and the magnetization fluctuations has been investigated and diagonalized. The smallest eigenvalue being 0 signalizes the phase instability and the related eigenvector characterizes this phase transition. We find a Curie line where the order parameter is pure magnetization and a spinodal where the order parameter is a mixture of particle density and magnetization. Along the spinodal, the character of phase in stability changes continuously from predominant condensation to predominant ferromagnetic phase transition with the decrease of total density. The spinodal meets the Curie line at the critical end point with the reduced density rho* = rho sigma(3) = 0.224 and the reduced temperature T* = kT/epsilon = 1.87 (sigma is the diameter of Heisenberg hard sphere and epsilon is the coupling constant).
2009
ISSN0253-6102
Volume51Issue:2Pages:287-292
Subject AreaPhysics
Indexed BySCI
Funding OrganizationNational Natural Science Foundation of China[10325418] ; National Natural Science Foundation of China[10325418] ; National Natural Science Foundation of China[10325418] ; National Natural Science Foundation of China[10325418]
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/5396
Collection理论物理所科研产出_SCI期刊论文
Corresponding AuthorLi, LS , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Li Liang-Sheng,Li Li,Chen Xiao-Song,et al. Characterization of Phase Transition in Heisenberg Fluids from Density Functional Theory[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2009,51(2):287-292.
APA Li Liang-Sheng,Li Li,Chen Xiao-Song,&Li, LS , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China.(2009).Characterization of Phase Transition in Heisenberg Fluids from Density Functional Theory.COMMUNICATIONS IN THEORETICAL PHYSICS,51(2),287-292.
MLA Li Liang-Sheng,et al."Characterization of Phase Transition in Heisenberg Fluids from Density Functional Theory".COMMUNICATIONS IN THEORETICAL PHYSICS 51.2(2009):287-292.
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