Anomalous Behavior of Electron Spin Resonance in K<sub>x</sub>C<sub>60</sub> Film Prepared by Electrochemical Method
Hisashi ArakiDepartment of Electronic Engineering, Faculty of Engineering, Osaka University, 2-1 Yamada-Oka, Suita, Osaka 565Nobuo YamasakiDepartment of Electronic Engineering, Faculty of Engineering, Osaka University, 2-1 Yamada-Oka, Suita, Osaka 565Tsuyoshi KawaiDepartment of Electronic Engineering, Faculty of Engineering, Osaka University, 2-1 Yamada-Oka, Suita, Osaka 565Anvar ZakhidovDapartment of Thermo-physics, Uzbek SSR Academy of Science, Katartal 28 Chilanzar, C. Tashkent, 700135 UzbekistanKatsumi YoshinoDapartment of Thermo-physics, Uzbek SSR Academy of Science, Katartal 28 Chilanzar, C. Tashkent, 700135 Uzbekistan
ABI
Abstract
Anomalous temperature dependence of the relative intensity ratio of three electron spin resonance (ESR) lines was observed in K x C 60 films prepared by electrochemical doping in a solid electrolyte. From the ESR saturation curves of those lines measured at various temperatures, their spin-lattice relaxation times ( T 1 ) were estimated. Novel changes in the intensity among those lines with increasing microwave power can be explained by taking the difference in T 1 of those lines into consideration. Under a relatively high doping condition the lowest T 1 of 3.5×10 -5 s was evaluated at 7.6 K.
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