摘要
合成了多金属普鲁士蓝类化合物Ni1.125Co0.375[Fe(CN)6].6.8H2O,室温穆斯堡尔谱和红外光谱研究表明金属离子通过氰根成键即Fe(s=1/2)—CN—(Co/Ni)(96%)和Fe(s=5/2)—NC—(Co/Ni)(4%)。超导量子干涉仪(SQUID)场冷却表明:在16 K时化合物从顺磁向铁磁转变,拟合获得顺磁居里点为16.508 K,说明此化合物是铁磁相互作用,当外场达到0.2 T时,零场冷却和场冷却下的磁化率随温度变化曲线几乎重合,为磁畴动力学行为引起的。
A multi-metal Prussian blue compound Ni1.125Co0.375[Fe（CN）6]·6.8H2O has been synthesized. Mossbauer spectroscopy at room temperature measurement and IR spectra studies indicate that the metal ions are bonded through Cyanide ligand in this compound,i, e. ：Fe^Ⅲ（s=1/2）-CN-（Co^Ⅱ/Ni^Ⅱ） and Fe^Ⅲ（s=5/2）-NC-（Co^Ⅱ/Ni^Ⅱ）. A paramagnetic to ferromagnetic transition is found at about 16 K in magnetization study,and a paramagnetic curie temperture θ= 16. 508 K was observed in fitting according to Curie-Weiss law. That means ferromagnetic interaction. When the field reaches 0. 2 T,the magnetic domain wall dynamics give rise to the overlap of the zero field cooling and field cooling susceptibility versus temperature curves.
出处
《广西师范大学学报（自然科学版）》
CAS
北大核心
2008年第3期49-52,共4页
Journal of Guangxi Normal University:Natural Science Edition
基金
国家自然科学基金资助项目(20461001)
广西自然科学基金资助项目(0447029)
关键词
穆斯堡尔谱
场冷却
铁磁相互作用
顺磁居里点
Moessbauer spectrum
field cooling
ferromagnetic interaction
paramagnetic curie temperature
