Study of anomalous spin state on dicyano-Phthalocyanine molecule by continuous oxidation control

本研究的目的是利用器件结构控制酞菁分子的自旋态。例如，在一个实施例中，场效应晶体管（FET）和自旋态的电子自旋共振（ESR）研究。首先，我们已经尝试制造酞菁的薄单晶，但是还没有获得合适的晶体尺寸。作为一种替代方法，我们利用电荷有序（CO）有机材料α-（BEDT-TTF）_2I_3制备了FET结构，以研究静电载流子注入的影响。我们已经观察到在CO状态下的n型和双极行为，而以前，只有n型特性的报道。此外，我们已经开发了电子自旋共振（ESR）测量系统，使用近场微波测量ESR信号从一个非常小的区域，如在FET结构中的导电沟道。该系统目前正在建设中。

The aim of this study is control of the spin state of Phthalocyanine molecule using device structures, e. g., field effect transistor(FET), and electron spin resonance(ESR) investigation of the spin state. First, we have tried to make thin single crystal of Phthalocyanine, but the appropriate crystal size is not obtained yet. As an alternative way, we have fabricated a FET structure using the charge-ordered(CO) organic materialα-(BEDT-TTF)_2I_3 to investigate the effects of electrostatic carrier injection. We have observed both n-type and bipolar behaviors in the CO state, whereas, previously, only n-type characteristics were reported. In addition, we have developed the electron spin resonance(ESR) measurement system using a near field microwave for measuring the ESR signal from a very small area such as a conducting channel in a FET structure. This system is now under construction.