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利用电化学结晶的方法制备了高质量的(BEDT-TTF)[FeBr4]单晶,通过四圆单晶衍射确定了其晶体结构为三斜晶系.在高温区,晶体电阻率与电子的热激发效率以及载流子受电离杂质散射的强弱有关.在低温区,晶体的导电性只依赖体内杂质缺陷等的电离.由于电子受到Lorentz力的作用增加了与晶格的碰撞次数,晶体的磁阻率表现为正值.晶体的磁性主要由三价铁离子决定,晶体中三价铁离子之间不具有铁磁耦合或反铁磁耦合.电子顺磁共振谱中同时发现π电子和d电子的共振信号,温度降低可使π电子和d电子的耦合作用增强,晶体沿着不同轴旋转,其共振信号随旋转角度的变化存在着巨大的差异.
A high quality (BEDT-TTF) [FeBr4] single crystal was prepared by electrochemical crystallization, and its crystal structure was determined to be triclinic by tetragonal single crystal diffraction. At high temperature, Excitation efficiency and charge carrier ionization by the impurity scattering strength in the low temperature region, the conductivity of the crystal depends only on the body of impurities such as ionization ion.Because the Lorentz force by the electron increases the collision with the lattice number, crystal The magnetoresistance shows a positive value. The magnetism of the crystal is mainly determined by the ferric ion, and there is no ferromagnetic coupling or antiferromagnetic coupling between the ferric ions in the crystal. In the electron paramagnetic resonance spectrum, π electron and d Electron resonance signal, the temperature decreases the π electron and the d electron coupling effect increases, the crystal along the axis of rotation, the resonance signal with the rotation angle there is a huge difference.