ORDER AND DISORDER IN NI3V - EFFECTIVE PAIR INTERACTIONS AND THE ROLEOF ELECTRONIC EXCITATIONS

Citation
M. Barrachin et al., ORDER AND DISORDER IN NI3V - EFFECTIVE PAIR INTERACTIONS AND THE ROLEOF ELECTRONIC EXCITATIONS, Physical review. B, Condensed matter, 50(17), 1994, pp. 12980-12983
Citations number
16
Categorie Soggetti
Physics, Condensed Matter
ISSN journal
01631829
Volume
50
Issue
17
Year of publication
1994
Pages
12980 - 12983
Database
ISI
SICI code
0163-1829(1994)50:17<12980:OADIN->2.0.ZU;2-9
Abstract
In situ neutron diffuse scattering experiments were performed on disor dered Ni3V. Effective pair interactions (EPI) were deduced from the me asured short-range order parameters. The EPI were used to predict succ essfully the disordering temperature and the temperature dependence of the excess free energies of two different antiphases in the ordered p hase. We also computed the energy difference between DO22 and L1(2): o ur result is eight times lower than found by electronic structure calc ulations at 0 K. This discrepancy is partly due to electronic excitati ons.