Relation between Diffuse Scatterings and Fermi Surface Nesting in Iron Doped Ti-Ni Alloys


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We have studied diffuse scatterings appearing in Ti-(50-x)Ni-xFe (x = 6, 7, 8, 10) alloy, which shows negative temperature coefficient in electrical resistivity below a temperature Tmin. Electron diffraction pattern of each alloy exhibits diffuse scatterings below Tmin on cooling. The intensity maximum of the diffuse scatterings is located at an incommensurate position of g+<ζζ0>, where g represents reciprocal lattice points of the B2-phase. The value ζ is slightly smaller than 1/3 and decreases with increasing Fe content. The diffuse scatterings of the present alloys are well explained by the nesting effect of the Fermi surface in the B2-type structure, i.e., ζ of each alloy agrees with the length of nesting vector in the [110] direction, which is evaluated by a first-principle calculation.



Materials Science Forum (Volumes 561-565)

Main Theme:

Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee




T. Yamamoto et al., "Relation between Diffuse Scatterings and Fermi Surface Nesting in Iron Doped Ti-Ni Alloys", Materials Science Forum, Vols. 561-565, pp. 2337-2340, 2007

Online since:

October 2007




[1] T. Ohba, Y. Emura and K. Otsuka: Mater. Trans. JIM Vol. 33 (1992), p.29.

[2] T. Ohba, N. Miyamoto, K. Fukuda, T. Fukuda, T. Kakeshita and K. Kato: Smart Mater. Struct. Vol. 14 (2005), p. S197.

[3] R. Oshima, M. Sugiyama and F. E. Fujita: Metall. Trans. A Vol. 19A (1988), p.803.

[4] I. M. Robertson and C. M. Wayman: Philos. Mag. A Vol. 48 (1983), p.421.

[5] Y. Noda, S. M. Shapiro, G. Shirane, Y. Yamada and L. E. Tanner: Phys. Rev. B Vol. 42 (1990), p.10397.

[6] D. Shindo and Y. Murakami: Sci. Tech. Adv. Mat. Vol. 1 (2000), p.117.

[7] D. Shindo, Y. Murakami and T. Ohba: MRS Bull. Vol. 27 (2002), p.121.

[8] M. -S. Choi, T. Fukuda, T. Kakeshita and H. Mori: Philos. Mag. Vol. 86 (2006), p.67.

[9] G. L. Zhao, T. C. Leung, B. N. Harmon, M. Keil, M. Müllner and W. Weber: Phys. Rev. B Vol. 40 (1989), p.7999.

[10] G. L. Zhao and B. N. Harmon: Phys. Rev. B Vol. 48 (1993), p. (2031).

[11] P. Blaha, K. Schwarz, G. K. H. Madsen, D. Kvasnicka and J. Luitz: WIEN2k, An Augmented Plane Wave + Local Orbitals Program for Calculating Crystal Properties (Karlheinz Schwarz, Techn. Universität Wien, Austria 2001).

[12] J. P. Perdew, S. Burke and M. Ernzerhof: Phys. Rev. Lett. Vol. 77 (1996), p.3865.

[13] J. Rath and A. J. Freeman: Phys. Rev. B Vol. 11 (1975), p.2109.