九江学院学报:自然科学版
九江學院學報:自然科學版
구강학원학보:자연과학판
Journal of Jiujiang University
2011年
4期
33-35
,共3页
混合Heisenberg模型%临界性质%平均场近似%二级相变
混閤Heisenberg模型%臨界性質%平均場近似%二級相變
혼합Heisenberg모형%림계성질%평균장근사%이급상변
mixed -spin Heisenberg model%critical temperature%mean -field approximation method%second - order phase transition
应用二自旋集团平均场近似的方法,研究了简立方晶格上混合自旋(s=1,s=1/2)的量子Heisenberg模型的临界性质.在不同的各向异性参量情况下,获得了磁化强度的热力学性质.结果表明,此系统存在二级相变,并且各向异性参数对系统的临界温度有一定的影响.
應用二自鏇集糰平均場近似的方法,研究瞭簡立方晶格上混閤自鏇(s=1,s=1/2)的量子Heisenberg模型的臨界性質.在不同的各嚮異性參量情況下,穫得瞭磁化彊度的熱力學性質.結果錶明,此繫統存在二級相變,併且各嚮異性參數對繫統的臨界溫度有一定的影響.
응용이자선집단평균장근사적방법,연구료간립방정격상혼합자선(s=1,s=1/2)적양자Heisenberg모형적림계성질.재불동적각향이성삼량정황하,획득료자화강도적열역학성질.결과표명,차계통존재이급상변,병차각향이성삼수대계통적림계온도유일정적영향.
Using the two - spin cluster mean - field approximation method, the critical behavior of the mixed - spin ( s = 1, s = 1/2) Heisenberg model on the cubic lattice was studied. For diferent anisotropic values, the thermal behavior of the magnetization were obtained. The results indicate that the mixed- spin Heisenberg system presents second -order phase transition, and the anisotropic value has influence on the critical temperature.