Results from Disk Chopper Spectrometer (DCS) measurements of local order and atomic displacements in a ⁶²NiPt crystal.

Simon Moss, University of Houston

Mr. Jose Rodriguez (University of Houston) has recently completed his Ph.D. dissertation with the analysis of NIST data for a nearly equiatomic "null-matrix" ⁶²NiPt alloy, grown and oriented by the MPI-Stuttgart. I will report in detail on this alloy's correlation functions, atomic displacements, and effective pairwise interactions (EPI's), which have been the subject of ongoing controversy. One result seems to indicate that both Ni-Ni and Pt-Pt neighbor pairs are nearly equally displaced, while the Ni-Pt pair suffers a considerably larger relative displacement magnitude.

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