Electron paramagnetic resonance (EPR) investigation zinc-phosphorus two-spin system in the silicon matrix

1. In the n-type silicon alloyed by phosphorus and compensated by zinc, on a background wide and intensive Lorentz lines the narrow undistinguished signal have been discovered. In a narrow interval of magnetic fields it finds out thin SFI structure. It is characterize for the ionic pair, which are taking place in triplet condition. The mathematical analysis of spectrum EPR of the second signal specifies formation of the individual ionic pair formed spin-free by neutral zinc atom and positively charged ion phosphorus (spin S=1/2). From dipole constants follows, that the distance between zinc atom and phosphorus in ionic pair makes about 10 angstrom (two nuclear distances of silicon). Temperature dependence of spectrum EPR of this ionic specifies pairs appreciable increase in distance in it at temperatures below 183K, that apparently, is caused by phase transition in a vicinity of this pair. Spectral parameters of ionic pair Zn-P are determined.