Noise in Sodium Beta Alumina Crystals.
UTAH UNIV SALT LAKE CITY DEPT OF PHYSICS
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Experimental current noise spectra for single crystal sodium beta alumina are essentially identical to those previously reported for polycrystalline ceramic specimens. The measured noise power is proportional to the square of the dc sample current and varies as 1.5f, which suggests conductivity fluctuations arising from diffusion of the mobile ions. Only a small fraction of the mobile ions appear to participate in the diffusion noise process and the number is thermally activated with an activation energy of 0.8eV, in agreement with data from ceramic specimens. Additional keywords diffusion noise superionic conductors experimental data. Author.
- Ceramics, Refractories and Glass
- Electricity and Magnetism