Stable metallic behavior and antiferromagnetic ordering of Fe(III) d spins in (EDO-TTFVO)2.FeCl4.
Stable metallic behavior and antiferromagnetic ordering of Fe(III) d spins in (EDO-TTFVO)2.FeCl4.
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DOI：
10.1021/ja055263d
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发表时间：
2005-09
影响因子：
15
通讯作者：
H. Fujiwara;K. Wada;T. Hiraoka;T. Hayashi;T. Sugimoto;H. Nakazumi;K. Yokogawa;M. Teramura;S. Yasuzuka;K. Murata;Takehiko Mori
中科院分区：
文献类型：
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作者：
H. Fujiwara;K. Wada;T. Hiraoka;T. Hayashi;T. Sugimoto;H. Nakazumi;K. Yokogawa;M. Teramura;S. Yasuzuka;K. Murata;Takehiko Mori
我们报道了一种新的供体分子EDO-TTFVO的2：1 FeCl_4-盐的晶体结构和物理性质。晶体结构分析表明，施主分子形成了一个β“型二维导电层，并有一个短的S型导电层。Cl接触之间的供体分子和FeCl 4-离子，这是预期介导一个强大的pi-d相互作用。该盐在0.3K以下表现出稳定的金属导电行为，在TN约3.0K时表现出反铁磁有序，表明该盐在常压下成为一种新的反铁磁分子金属。磁有序的出现被认为是源于施主分子和FeCl 4-离子之间的强π-d相互作用，因为在反铁磁转变温度以下，磁电阻的场依赖性受到显着影响。
We report the crystal structure and physical properties of the 2:1 FeCl4- salt of a new donor molecule, EDO-TTFVO. Crystal structure analysis of this salt revealed that the donor molecules formed a beta' '-type two-dimensional conducting layer, and there is a short S...Cl contact between the donor molecules and the FeCl4- ions, which is expected to mediate a strong pi-d interaction. This salt showed a stable metallic conducting behavior down to 0.3 K and an antiferromagnetic ordering at TN approximately 3.0 K, indicating that this salt becomes a new antiferromagnetic molecular metal at ambient pressure. The appearance of the magnetic ordering is considered to originate from the strong pi-d interactions between the donor molecules and the FeCl4- ions because the field dependence of magnetoresistances was remarkably affected below the antiferromagnetic transition temperature.