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Molecule-based system with coexisting conductivity and magnetism and without magnetic inorganic ions

机译:基于分子的系统,具有导电性和磁性并存,并且没有磁性无机离子

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摘要

An ion-radical salt, (ESBN)_2ClO_4, obtained from the electrochemical crystallization of an organic donor radical, ESBN, exhibited giant negative magnetoresistance (-70% at 2 K in 9 T) in spite of the absence of metal ions. Furthermore, it was found that the conductivity of (ESBN)_2ClO_4 was characterized by a distinct nonlinear temperature dependence and a nonlinear power law of I∝V~n (n=12). We speculated that such correlated spin-dependent electron transportation is derived from the charge-ordered electronic structure and the strong intramolecular ferromagnetic coupling between π-conduction electrons and π-localized spins in the "spin-polarized donor."
机译:尽管不存在金属离子,但从有机供体基团ESBN的电化学结晶中获得的离子自由基盐(ESBN)_2ClO_4仍显示出巨大的负磁电阻(在2 K,9 T下为-70%)。此外,发现(ESBN)_2ClO_4的电导率具有明显的非线性温度依赖性和I powerV〜n(n = 12)的非线性幂定律。我们推测这种相关的自旋相关的电子传输源于电荷有序的电子结构以及“自旋极化供体”中π导电电子与π局部自旋之间的强分子内铁磁耦合。

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