Electrical Properties of Manganese Dioxide and Manganese Sesquioxide

Publisher Website
Google Scholar
Abstract
Measurements of electrical properties of and were carried out on material obtained by pyrolysis of . From resistivity data, it is proposed that the conduction process is due to oxygen forming a donor level at 0.044 eV. In , oxygen vacancies might be acting as an acceptor level with an activation energy of 0.30 eV. Resistivity measurements were used to establish the transition temperature at 545°C. The Hall mobility of was measured at 25°C. For resistivities of 0.1–100 ohm‐cm, the mobility depends on the resistivity. This was taken as an indication that impurity scattering is the dominating process in this region. The voltage‐current characteristic was measured for samples from 0.1 to 105 ohm‐cm. The material showed ohmic behavior for fields from 10 mV/cm to 100 V/cm. The Seebeck coefficient was investigated over the temperature range 25°‐125°C. A response of 0.6 mV/°C was found in high‐resistivity n‐type , and 0.37 mV/°C in .

This publication has 0 references indexed in Scilit: