• 作者： 胡進錕；萬德深； RINSE研究小組
• 作者服務機構： 緬因大學物理及天文系; 中山科學研究院
• 中文摘要： 本論文及隨後一系列論文中，我們將應用修訂之Kadanoff變分法以計算包含二重及三重態自旋之鐵淦氧化物艾辛模 型下限自由能。在本論文中我們計算此種模型在體心晶格及?有零場裂距情形下之自由能及其導數，我們發現在βc= 0.3864366 ±10-7 有一個臨界點，並估計出臨界指數α = 0.109 ±0.002, α'= 0.084 ± 0.002
• 英文摘要： This is the first of a series of papers which apply modified Kadanoffs variational method to calculate the lower bound free energies for an Ising model of ferrimagnetism consisting of triplet and doublet ion with nearest neighbor exchange interaction. In this paper, we calculate the lower bound free energies and their derivatives for 3 dimensional model on bcc lattice and without zero field splitting. We find a critical point βc = 0.3864366 ± 10-7 and the associated critical indices a = 0.109 ±0.002, a' = 0.084 ±0.002.
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