Electrical conductivity and thermoelectric power of nickel-zinc ferrites

✍ Scribed by R. Satyanarayana; Dr. S. Ramana Murthy

• Publisher: John Wiley and Sons
• Year: 1985
• Tongue: English
• Weight: 393 KB
• Volume: 20
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/crat.2170200819

✦ Synopsis

Elcctriral condiirtivity (0) antl thermoelectric powcr (Q) of polycrystalline nickel-zinc ferritcs of different roinposit ions was investigated as a function of rornposition a n d temperature. The elertriral conductivity in these ferrites is explained on the basis of the hopping mechanism. Plots of log (oT) versus 10S/T are almost linear and show a transition near the ciiric temperature. The acetivation energy in the ferrimagnetic rcigion is iii general less than that in the paranmgnetir rcgion. The carrier roncentlation and mobility of chaige c*arric,rs has bccn tlisrrisqed as a function of ron~position antl teniperaturc..