Magnetic Orderings and Néel Temperature of TbNi2B2C
Magnetic Orderings and Néel Temperature of TbNi2B2C作者机构：Faculty of Mathematics and Physics Nanjing University of Information Science and Technology Nanjing 210044 Department of Condensed Matter Physics Faculty of Mathematics and Physics Charles University Ke Karlovu 5 121 16 Prague 2 Czech Republic
出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)
年 卷 期：2009年第26卷第10期
页 面：177-180页
核心收录：
学科分类：12[管理学] 1201[管理学-管理科学与工程(可授管理学、工学学位)] 07[理学] 08[工学] 080501[工学-材料物理与化学] 070105[理学-运筹学与控制论] 0805[工学-材料科学与工程（可授工学、理学学位）] 0701[理学-数学]
基 金：Supported by the Natural Science Foundation of Jiangsu Province under Grant No BK2008438 and the Ministry of Education of the Czech Republic under Grant No MSM-0021620834
主 题：Condensed matter: electrical magnetic and optical
摘 要：We employ a two-ion model to calculate the spontaneous magnetization and susceptibility of TbNi2B2C with the mean-field theory, and derive an analytic formula for the Néel temperature of the material with the perturbation theory. In both the cases, only the four lowest crystal-electric-field （CEF） states are taken into account as base functions. Our theoretical results are consistent with the experimental data, manifesting the strong effects of the low lying CEF states on the magnetic behaviors of the material and the suitability of the theoretical approach proposed here.
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