Investigation of temperature dependent electrical and impedance characteristics of bulk Zn0.95Co0.05O

Turan N., Oruç P., Demirolmez Y., Seckin A., Çağırtekin A. O., Çavdar Ş., ...Daha Fazla

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, cilt.100, sa.1, ss.147-159, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 100 Sayı: 1
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1007/s10971-021-05623-w
  • Dergi Adı: JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Aerospace Database, Applied Science & Technology Source, Biotechnology Research Abstracts, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, Computer & Applied Sciences, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.147-159
  • Anahtar Kelimeler: Zn0.95Co0.05O, Impedance spectroscopy, Resistivity, Relaxation time, Activation energy, OPTICAL-PROPERTIES, THIN-FILMS, MAGNETIC-PROPERTIES, COMPLEX IMPEDANCE, ZNO NANOPARTICLES, OXYGEN VACANCIES, CO, OXIDE, SPECTROSCOPY, FERROELECTRICITY
  • Gazi Üniversitesi Adresli: Evet

Özet

Zn0.95Co0.05O was synthesized by sol-gel method and then Zn0.95Co0.05O pellet was prepared to investigate its structural, morphological, electrical, and impedance properties. For this purpose, the pellet was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and impedance measurement techniques. SEM images showed that the particle sizes of Zn0.95Co0.05O were between 1 and 100 mu m. The frequency and temperature dependence of capacitance, conductance, and complex impedance characteristics of Zn0.95Co0.05O in a pellet form were investigated within the temperature range of 300-500 K and frequency range of 1 kHz-1.5 MHz. The radii of the semicircular arc reduced with increasing temperature revealing that the Zn0.95Co0.05O shows negative temperature coefficient of resistance as in semiconductors. The impedance analysis revealed the contribution of grains and grain boundaries to the conduction and polarization processes.