Magnetic Properties of (C1TEX-TTF)FeBr4(X˭S, Se)
Magnetic Properties of (C1TEX-TTF)FeBr4(X˭S, Se)
复制标题
(C1TEX-TTF)FeBr4(X˭S, Se)的磁性
DOI：
10.1080/10587259908028873
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发表时间：
1999
影响因子：
0.7
通讯作者：
T. Enoki
中科院分区：
文献类型：
--
作者：
M. Enomoto;A. Miyazaki;T. Enoki
通过晶体结构分析和磁化率测量，研究了同构π-d相互作用体系（C1 TEX-TTF）FeBr 4（X → S，Se）的磁性与晶体结构之间的关系。这些盐形成由一维阴离子之字形链和供体二聚体组成的片状结构，后者桥接在两个阴离子链之间。磁化率为三角形的自旋梯结构，只有Fe ~（3+）（S=5/2）自旋对磁化率有贡献，X → S和Se分别在TN=4.2K和3.6K发生反铁磁相变.在T N以下，当磁场沿其中一个自旋硬轴沿着作用时，由于Dzy-aloshinski-Moriya相互作用，出现弱铁磁性.两种盐在弱铁磁转变中的差异表明，随着X → S变为Se，两个Fe 3 ±自旋梯之间的相互作用减少了一半。
Abstract The correlation between the magnetic properties and crystal structure of isostructural π-d interaction systems (C1TEX-TTF)FeBr4 (X˭S, Se) is investigated by crystal structure analysis and magnetic susceptibility measurements. These salts form a sheet structure consisting of one-dimensional anion zigzag chains and donor dimers, the latter of which bridge between two anion chains. The susceptibility, to which only Fe3± (S=5/2) spins contribute as a triangle-based spin ladder system, shows antiferromagnetic phase transitions at TN=4.2K and 3.6K for X˭S and Se, respectively. Below T N, weak ferromagnetism appears due to the Dzy-aloshinski-Moriya interaction when the field is applied along one of the spin hard-axes. The difference between the two salts in the weak ferromagnetic transition suggests that the interaction between two Fe3± spin ladders is reduced by a half with changing X˭S to Se.