TY - GEN
T1 - Relation between diffuse scatterings and fermi surface nesting in iron doped Ti-Ni alloys
AU - Yamamoto, Takuya
AU - Choi, Mi Seon
AU - Majima, Sho
AU - Fukuda, Takashi
AU - Kakeshita, Tomoyuki
AU - Taguchi, Eiji
AU - Mori, Hirotaro
PY - 2007
Y1 - 2007
N2 - 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.
AB - 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.
KW - Electrical resistivity
KW - Precursor phenomena
KW - Shape memory alloys
KW - Titanium-nickel alloy
UR - http://www.scopus.com/inward/record.url?scp=38349123627&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=38349123627&partnerID=8YFLogxK
U2 - 10.4028/0-87849-462-6.2337
DO - 10.4028/0-87849-462-6.2337
M3 - Conference contribution
AN - SCOPUS:38349123627
SN - 0878494626
SN - 9780878494620
T3 - Materials Science Forum
SP - 2337
EP - 2340
BT - Selected, peer reviewed papers from The Sixth Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6
PB - Trans Tech Publications Ltd
T2 - 6th Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6
Y2 - 5 November 2007 through 9 November 2007
ER -