Regensburg 2007 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 15: Phase transitions I

MM 15.3: Talk

Tuesday, March 27, 2007, 10:45–11:00, H4

Diffuse x-ray scattering from the refractory alloy systems Mo-Ta and Nb-Ta — •Harald Reichert, John Okasinski, Markus Mezger, and Helmut Dosch — Max-Planck-Institut für Metallforschung, Heisenbergstrasse 3, 70569 Stuttgart, Germany

We have performed diffuse x-ray scattering experiments on the bcc refractory alloy systems Mo-Ta and Nb-Ta. Using high energy x-rays in transmission geometry we were able to map the diffuse scattering of single crystalline samples as a function of concentration and temperature. In addition to thermal diffuse scattering we found diffuse scattering from short-range order. Our results will be compared with recently published first-principles calculations [1].

[1] V. Blum, A Zunger, Phys. Rev. B 70, 155108 (2004).