一个新型分子铁磁体——氰根桥联的铜(Ⅱ)-铁(Ⅲ)配合物

A Novel Molecular-Based Ferromagnet——Cyano-Bridged Cu(Ⅱ)-Fe(Ⅲ) Complex

合成和表征了一个新的分子磁体,氰根桥联的杂化型异金属配合物[Cu(en)]_3[Fe(CN)_6]_2·3H_2O(en为乙二胺).变温磁化率、零场冷却磁化强度(ZFCM)、场冷却磁化强度(FCM)和磁滞回线测量表明铜铁离子间存在着铁磁性相互作用,其铁磁相变温度为T_c=11.0K,矫顽力为20×10^(-4)T,剩磁为1.70×10^(-1)cm^3·mol^(-1)·T.该化合物为杂化型铜(Ⅱ)-铁(Ⅲ)普鲁士蓝类中具有铁磁相变温度的首例.

A new molecular-based ferromagnet [Cu(en)]3[Fe(CN)6]2·3H2O has been synthesized and characterized. Variable-temperature magnetic susceptibility, zero-field-cooled magnetization (ZFCM), field-cooled-magnetization (FCM) and the hysteresis loop measurements show that a ferromagnetic interaction exists between the copper(Ⅱ) and iron(Ⅲ) ions. The critical phase-transition temperature, coercive force and remnant magnetization are 11. 0K, 20×10-4T, and 1. 70×10-1 cm3·mol-1·T respectively. To our knowledge, the present complex is the first example with a Tc value for the hybrid type copper(Ⅱ) - iron(Ⅲ) complexes.