BaMnxTi1-xO3 (0≤x≤0.01) ceramics have been prepared using a sol-gel method. The Hall coefficient, leakage conductance and dielectric constant were measured. The Hall effect confirms that the charge carriers of the ceramics are electrons, and the electronic concentration n=1/|eR| decreases with increasing Mn concentration. We propose that Mn3+ and Mn4+ substitution of Ti can partially trap the conductance electrons. The dielectric constant ε1 of the pellets exhibited a peak at Tc∼110°C upon heating and the height and position of this peak depends on the Mn concentration. The Mn2+ incorporated in the oxygen octahedron of the BaTiO3 unit cell is in a more centered position than Ti4+ and may, therefore, modify considerably the ferroelectric property.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Surfaces, Coatings and Films
- Electrical and Electronic Engineering