کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
975671 | 933044 | 2007 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The high temperature expansion of the classical XYZ chain
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موضوعات مرتبط
مهندسی و علوم پایه
ریاضیات
فیزیک ریاضی
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چکیده انگلیسی
The β-expansion of the Helmholtz free energy (HFE) up to order β12 of the classical XYZ model with a single-ion anisotropy term and external magnetic field is calculated and compared to the numerical solution of Joyce's [Phys. Rev. Lett. 19 (1967) 581] for the XXZ classical model, with neither single-ion anisotropy term nor external magnetic field. This comparison shows that the derived analytical expansion is valid for intermediate temperatures such as kT/Jxâ0.5. The specific heat and magnetic susceptibility of the S=2 antiferromagnetic chain can be approximated by their respective classical results, within an error of 2.5%, up to kT/Jâ0.8. For a vanishing external magnetic field the ferromagnetic and antiferromagnetic chains are shown to have the same classical HFE; their behaviour in a non-vanishing external magnetic field is also described.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica A: Statistical Mechanics and its Applications - Volume 375, Issue 1, 15 February 2007, Pages 185-198
Journal: Physica A: Statistical Mechanics and its Applications - Volume 375, Issue 1, 15 February 2007, Pages 185-198
نویسندگان
E.V. Corrêa Silva, Onofre Rojas, James E.F. Skea, S.M. de Souza, M.T. Thomaz,