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通过溶剂热的方法合成了一个具有nia拓扑结构混合价的甲酸铁铵盐,并对其进行了单晶结构和磁性表征,该化合物不仅在T_N=37.2K以下显示亚铁磁体的性质,还在大约28K出现温度补偿磁性行为。本文首次用分子场理论对该磁体的温度补偿行为和磁结构相关性进行了详细的讨论与分析。
An iron ammonium formate with a nia topological structure was synthesized by solvothermal method and characterized by single crystal structure and magnetic properties. The compound not only shows the ferrimagnetic properties under the condition of T_N = 37.2K, Approximately 28K appears temperature-compensated magnetic behavior. In this paper, the molecular field theory is used to discuss and analyze in detail the correlation between the temperature compensation behavior and the magnetic structure of the magnet.