Naskar Moumita, Acharyya Muktish, Vatansever Erol, Fytas Nikolaos G
Department of Physics, Presidency University, 86/1 College Street, Kolkata-700073, India.
Department of Physics, Dokuz Eylül University, TR-35160 Izmir, Turkey and Centre for Fluid and Complex Systems, Coventry University, Coventry CV1 5FB, United Kingdom.
Phys Rev E. 2021 Jul;104(1-1):014107. doi: 10.1103/PhysRevE.104.014107.
We present an extensive Monte Carlo investigation of the metastable lifetime through the reversal of the magnetization of spin-s Ising and Blume-Capel models, where s={1/2,1,3/2,2,5/2,3,7/2}. The mean metastable lifetime (or reversal time) is studied as a function of the applied magnetic field, and for both models it is found to obey the Becker-Döring theory, as was initially developed for the case of an s=1/2 Ising ferromagnet within the classical nucleation theory. Moreover, the decay of the metastable volume fraction nicely follows Avrami's law for all values of s and for both models considered.
我们通过自旋为(s)的伊辛（Ising）模型和布鲁姆 - 卡佩尔（Blume - Capel）模型的磁化反转，对亚稳态寿命进行了广泛的蒙特卡罗研究，其中(s = {1/2, 1, 3/2, 2, 5/2, 3, 7/2})。研究了平均亚稳态寿命（或反转时间）作为外加磁场的函数，并且发现对于这两个模型，它都遵循贝克尔 - 多林（Becker - Döring）理论，该理论最初是在经典成核理论中针对(s = 1/2)的伊辛铁磁体情况发展而来的。此外，对于所考虑的两个模型以及所有(s)值，亚稳态体积分数的衰减都很好地遵循阿夫拉米（Avrami）定律。
