Relation between diffuse scatterings and fermi surface nesting in iron doped Ti-Ni alloys

Takuya Yamamoto, Mi Seon Choi, Sho Majima, Takashi Fukuda, Tomoyuki Kakeshita, Eiji Taguchi, Hirotaro Mori

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationSelected, peer reviewed papers from The Sixth Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6
PublisherTrans Tech Publications Ltd
Pages2337-2340
Number of pages4
EditionPART 3
ISBN (Print)0878494626, 9780878494620
DOIs
Publication statusPublished - 2007
Event6th Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6 - Jeju, Korea, Republic of
Duration: 2007 Nov 52007 Nov 9

Publication series

NameMaterials Science Forum
NumberPART 3
Volume561-565
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

Other6th Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6
CountryKorea, Republic of
CityJeju
Period07/11/507/11/9

Keywords

  • Electrical resistivity
  • Precursor phenomena
  • Shape memory alloys
  • Titanium-nickel alloy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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