Au Schottky diodes have been fabricated on B-doped natural diamond and
analyzed by their frequency-dependent impedance (locus diagram) in th
e bias and temperature regimes. In comparison with the physical struct
ure, this method allows an equivalent circuit to be established, the i
ndividual R and C elements being determined by a network analyzer opti
mization routine. A three-component circuit configuration is identifie
d.