THE INSTABILITY OF PAIDAR-POPE-VITEK LOCKS IN L12 COMPOUNDS

Authors
SCHOECK G
Citation
G. Schoeck, THE INSTABILITY OF PAIDAR-POPE-VITEK LOCKS IN L12 COMPOUNDS, Philosophical magazine letters, 70(4), 1994, pp. 179-187
Citations number
25
Categorie Soggetti
Physics, Condensed Matter
Journal title
Philosophical magazine letters → ACNP
ISSN journal
09500839
Volume
70
Issue
4
Year of publication
1994
Pages
179 - 187
Database
ISI
SICI code
0950-0839(1994)70:4<179:TIOPLI>2.0.ZU;2-F
Abstract
It is shown that in L1(2) ordered compounds due to the interaction bet ween the superpartials a Paidar-Pope-Vitek (PPV) lock has a higher ene rgy than the planar glissile configuration, when both are in their rel axed equilibrium configuration. Hence PPV locks are intrinsically unst able. Using typical material parameters for Ni3Al it is shown that gen erally the driving forces on the cube plane are also not large enough to produce stable PPV locks during deformation.