Abstract
We have calculated electronic structure of B2-type Ti-(50 - x)Ni-xFe (0 ≤ x ≤ 28) alloys in order to understand the concentration dependence of the phase stability of the B2-type structure in this system. The Fermi surface of each alloy shows a nesting with a sharp peak of generalized susceptibility χ(q) at a nesting vector of q = [ζζ0]2π/a. The value of ζ at the peak position decreases linearly as the Fe content increases. On the contrary, the peak height of χ(q) does not change monotonically but shows a maximum value for Ti-44Ni-6Fe alloy. This result is consistent with the experimental results obtained by resistivity and specific heat measurements. In addition, we found that although the χ(q) shows a local maximum near 1/3[110]2π/a in Ti-44Ni-6Fe alloy, it shows a saddle point near 1/3[110]2π/a in TiNi.
| Original language | English |
|---|---|
| Pages (from-to) | 594-598 |
| Number of pages | 5 |
| Journal | Materials Transactions |
| Volume | 47 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2006 Mar |
| Externally published | Yes |
Keywords
- Band calculation
- Diffuse scattering
- Phonon softening
- Precursor phenomena
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering