Mossbauer Evidence for Ferromagnetic Ordering in Copper-Iron Cyanometallates

• 来源期刊: 中国物理快报（英文版）
• 学科: 物理学
• 年，卷（期）: 2002,（4）
• 页码范围: 595-598
• 页数: 4页
• 分类号: O4
• 语种: 英文

摘要

A novel member of the Prussian blue family, Cu3Ⅱ [FeⅢ (CN)6]2@ 3NH3@6H2O, was synthesized, in which NH3 ligands are in stochastic distribution. We present x-ray diffraction data, zero-field-cooled magnetization and fieldcooled magnetization curves, Mossbauer spectra with/without an external field of 5 T and a structural model. This Prussian blue analogue displays considerable magnetic hardness below the magnetic transition temperature Tc, which is about 19.8 K. The coercive field determined from the magnetization hysteresis loop at 5 K was 2. 76 kOe. The copper-iron cyanometallates have potential applications in the design of novel magnetic systems.