Author/Authors :
Létoublon، نويسنده , , A and Fisher، نويسنده , , I.R and Sato، نويسنده , , T.J and de Boissieu، نويسنده , , M and Boudard، نويسنده , , M and Agliozzo، نويسنده , , S and Mancini، نويسنده , , L and Gastaldi، نويسنده , , J and Canfield، نويسنده , , P.C and Goldman، نويسنده , , A.I and Tsai، نويسنده , , A.-P، نويسنده ,
Abstract :
The structural perfection of eight samples of icosahedral Zn–Mg–R (R=Y, Ho and Tb) single grains has been studied by high resolution X-ray diffraction. Four samples present a systematic peak shift proportional to Qper characteristic of a linear phason strain. Two other samples present a peak splitting proportional to Qper. Only two samples had their Bragg peak position corresponding to the ideal one, with a width increasing linearly with Qper. The perfection of one of these last two samples was investigated by synchrotron monochromatic X-ray topography. It was found to be a microstructure similar to the one exhibited by conventional crystals grown by the same technique (flux-growth).
