Тип публикации: статья из журнала
Год издания: 2018
Идентификатор DOI: 10.1080/1536383X.2018.1501559
Ключевые слова: Endohedral metallofullerene, impedance spectroscopy, polarization
Аннотация: The article presents, for the first time, the results of the research on composite film obtained from hydroxylated endohedral metallofullerenes (EMF) Y@C-82, Y-2@C-82,C- with Y2C2@C-82 and highest fullerenes as dopant. The composite film has been established to have electric conductivity and to be a ferroelectric with the value of Показать полностьюresidual polarization of similar to 0.75 mu C/cm(2). The impedance spectroscopy of this sample allowed us to determine dispersion of dielectric permittivity and conductivity in the range of frequencies of 0.5 Hz-100 MHz. It is stated that the value of the high-frequency dielectric permittivity of films is epsilon '(infinity) = 2.8. However, with reduction in the electric field frequency, real and imaginary parts of epsilon increase to values similar to 10(4)-10(5). Such increase in dielectric permittivity is connected with increase in polarizing caused by accumulation of mobile electric charges (electrons of ions, protons) on boundaries of the structural defects of a film, which are divided by thin dielectric interlayers. The film is solid electrolyte with the ionic conductivity of similar to 5 x 10(-7) S/cm.
Журнал: FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
Выпуск журнала: Vol. 26, Is. 12
Номера страниц: 799-803
ISSN журнала: 1536383X
Место издания: PHILADELPHIA
Издатель: TAYLOR & FRANCIS INC