An investigation of the structure of amorphous Co-P alloys. 2: EXAFS at the phosphorous K-edge, a feasibility study

Amorphous Co100 - xPx foils in the concentration range 13.4 less than or eq ual to x less than or equal to 26 were produced by electrodeposition. The e xtended X-ray absorption fine structure (EXAFS) at the phosphorous K-edge w as measured in transmission mode. The phase shift was determined from the E XAFS spectrum of a crystalline Co2P reference sample. The EXAFS spectra of the amorphous Co-P alloys are characterized mainly by one single contributi on from a shell of Go-atoms at a distance of 2.3 Angstrom around the P-atom s. A small additional contribution at a shorter distance of 2.0 Angstrom ma y be a hint on some direct P-P neighbours. The evaluation of reliable coord ination numbers from the EXAFS spectra of the amorphous alloys is not possi ble.