Abstract
The microwave dielectric properties of SrTiO3 and CaNdAlO4 single crystals were measured by the resonant cavity method, and the effect of sample size on measurement reliability was investigated. High measurement accuracy could always be achieved for SrTiO3, while the measurement was completely unreliable for CaNdAlO4 with small sizes. The difference was attributed to the much higher dielectric constant and electric energy filling factor of SrTiO3. It is indicated that the sample with much smaller size than usual might also be used for the resonant cavity method, as long as the electric energy filling factor of the sample was high enough.
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