interpreted as due to 3D domain wall pinning. In a bias dc magnetic field the width of the relaxation time distribution decreases and the relaxations become similar to the relaxations of the single chain magnet Mn(III) tetra(ortho-fluorophenyl)porphyrin-tetracyanoethenide (abbreviated ortho-F), for which comparative HF-ESR studies were also conducted in this work. Magnetic properties of these two compounds
合成了Mn(III)四(间-
氟苯基)
卟啉-
四氰基乙烯配位聚合物(缩写为间-F),并进行了晶体学和磁学表征。该化合物在空间群C 2 / c中结晶在单元格中具有四个等效分子的分子沿两个对称相关的不平行线性链方向排列。通过SQUID直流磁化和磁化率技术以及高场-高频电子自旋共振(HF-ESR)研究了磁性。在10 K下观察到
玻璃态转变为类似
铁磁的状态,并伴有缓慢的磁弛豫。透明性被解释为归因于3D畴壁钉扎。在直流偏置磁场中,弛豫时间分布的宽度减小,并且弛豫与单链磁体Mn(III)四(邻-
氟苯基)
卟啉-
四氰基乙烯(简称为邻
氰基)的弛豫相似-F),在这项工作中也进行了比较HF-ESR研究。比较了这两种化合物的磁性能,并讨论了间位F中磁弛豫的性质。