کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
977231 | 933180 | 2009 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Critical properties of the mixed spin-1 and spin-12 anisotropic Heisenberg model in the Oguchi approximation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
ریاضیات
فیزیک ریاضی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Critical properties of the mixed spin-1 and spin-12 anisotropic Heisenberg model in the Oguchi approximation Critical properties of the mixed spin-1 and spin-12 anisotropic Heisenberg model in the Oguchi approximation](/preview/png/977231.png)
چکیده انگلیسی
The effects of both an exchange anisotropy and a single-ion anisotropy on the phase diagram of the mixed spin-1 and spin-12 Heisenberg model are investigated by the use of an Oguchi approximation. Particular emphasis is given to the simple cubic lattice with coordination number z=6z=6 for which the phase diagram and magnetizations are determined numerically. Besides second-order transitions, lines of first-order transitions terminating either at a tricritical point or an isolated critical point, are determined. The origin and nature of the new ordered phase in the quantum mixed-spin system at the low temperature region is also discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica A: Statistical Mechanics and its Applications - Volume 388, Issue 11, 1 June 2009, Pages 2157–2167
Journal: Physica A: Statistical Mechanics and its Applications - Volume 388, Issue 11, 1 June 2009, Pages 2157–2167
نویسندگان
A. Bobák, V. Pokorný, J. Dely,