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Large magnetic anisotropy in a quasi-1D ferromagnetic complex Co(sba)(H2O)2·H2O (sba = 4-sulfobenzoate)
Journal of Solid State Chemistry ( IF 3.3 ) Pub Date : 2020-06-28 , DOI: 10.1016/j.jssc.2020.121527
Naoyuki Nomoto , Takashi Fujihara , Norihiko Kamata , Yuya Sawada , Takanori Kida , Masayuki Hagiwara , Zentaro Honda

We have determined the crystal structures of new Co(II) polynuclear complex Co(sba)(H2O)2·H2O (sba ​= ​4-sulfobenzoate) (1) by X-ray crystallography. The crystal structure of 1 shows Co(II) uniform chains in which octahedral Co(II) centers are connected through double μ-OH2 single syn-syn μ-carboxylato bridging ligands, and these uniform chains are well separated by the sba ligands. Magnetization and magnetic susceptibility data of a single crystal of 1 taken along the different crystallographic axes suggest a large uniaxial magnetic anisotropy, the so-called Ising anisotropy, possessing large c∗-axis magnetic moments. Magnetic susceptibility data of 1 is explained by an 1D Ising ferromagnet with intra-chain exchange interaction of Jz/kB ​= ​39.6 ​K.



中文翻译:

准一维铁磁性配合物Co(sba)(H 2 O)2 ·H 2 O(sba = 4-磺基苯甲酸酯)中的大磁各向异性

我们已经通过X射线晶体学确定了新的Co(II)多核配合物Co(sba)(H 2 O)2 ·H 2 O(sba = 4-磺基苯甲酸酯)(1)的晶体结构。的晶体结构1共同示出了(II)一致的链,其中八面体的Co(II)中心通过双连接μ -OH 2顺-顺μ -carboxylato桥接配体,和这些均匀的链通过在SBA配体很好地分离。沿不同晶体学轴获取的单晶1的磁化和磁化率数据表明,单轴磁各向异性大,即所谓的伊辛各向异性,具有大的单轴磁各向异性。c ∗轴磁矩。磁化率1的数据由一维Ising铁磁体解释,链内交换相互作用为J z / k B  = 39.6 K.

更新日期:2020-07-13
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