کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10728024 | 1037812 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dynamic phase transition in the Heisenberg model under a time-dependent oscillating field
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک و نجوم (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We derive a new three-dimensional mean-field equation of motion for the average magnetization with a Heisenberg model, and calculate the time averaged magnetization components Qz and Qx, and the average hysteresis-loop area components Az and Ax. A dynamic H0-T transition phase diagrams from Qâ 0 to Q=0 for the 2D and 3D cases are obtained. It is found that the dynamic behavior for the Heisenberg model is different from that for the Ising model. The phase diagrams with different coordinate number z and the orientation number of spin n have been well explained using the competition between the relaxation time and the period of the external magnetic field. A dynamical scaling, Aâ¼H0aÏbξ[ÏH0γ], is studied, and the best exponents a,b and γ with the best data collapse are obtained. For the 3D case, two different scaling expressions are valid in the low and high frequency regions, respectively. For the 2D case, however, one scaling relationship is suitable for the whole frequency region.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters A - Volume 338, Issue 6, 9 May 2005, Pages 485-493
Journal: Physics Letters A - Volume 338, Issue 6, 9 May 2005, Pages 485-493
نویسندگان
Zhigao Huang, Zhigao Chen, Fengming Zhang, Youwei Du,