TY - JOUR
T1 - Iron content and temperature dependences of diffuse scattering in Ti-(50-x)Ni-xFe (6≤x≤10) alloys
AU - Yamamoto, Takuya
AU - Choi, Mi Seon
AU - Majima, Sho
AU - Fukuda, Takashi
AU - Kakeshita, Tomoyuki
AU - Taguchi, Eiji
AU - Mori, Hirotaro
N1 - Funding Information:
The present work was partly supported by Priority Assistance for the Formation of Worldwide Renowned Centers of Research – The Global COE Program (Project: Center of Excellence for Advanced Structural and Functional Materials Design) from the Ministry of Education, Culture, Sports, Science and Technology, Japan.
PY - 2008/3
Y1 - 2008/3
N2 - Diffuse scatterings appearing in electron diffraction patterns of Ti-(50-x)Ni-xFe (x=6, 7, 8, 10, in at.%) alloys were investigated. In the alloys, martensitic (R-phase) transformation is suppressed down to 4.2 K, but the electrical resistivity exhibits a local minimum at Tmin (210 K, 195 K, 180 K and 140 K for x=6, 7, 8, 10, respectively). The following results were obtained for all the alloys. Diffuse scattering appears below Tmin and its intensity maximum is located at an incommensurate position of g+«ζζ 0»*, where g is a reciprocal lattice vector of the B2-phase. The value ζ at Tmin is significantly smaller than 1/3 and increases with decreasing temperature; it decreases with increasing Fe content. The value of ζ at Tmin agrees with the length of nesting vector obtained by a band calculation, suggesting that the diffuse scattering is caused by the nesting effect of the Fermi surface in the B2-type structure.
AB - Diffuse scatterings appearing in electron diffraction patterns of Ti-(50-x)Ni-xFe (x=6, 7, 8, 10, in at.%) alloys were investigated. In the alloys, martensitic (R-phase) transformation is suppressed down to 4.2 K, but the electrical resistivity exhibits a local minimum at Tmin (210 K, 195 K, 180 K and 140 K for x=6, 7, 8, 10, respectively). The following results were obtained for all the alloys. Diffuse scattering appears below Tmin and its intensity maximum is located at an incommensurate position of g+«ζζ 0»*, where g is a reciprocal lattice vector of the B2-phase. The value ζ at Tmin is significantly smaller than 1/3 and increases with decreasing temperature; it decreases with increasing Fe content. The value of ζ at Tmin agrees with the length of nesting vector obtained by a band calculation, suggesting that the diffuse scattering is caused by the nesting effect of the Fermi surface in the B2-type structure.
KW - Electronic structure
KW - Martensitic transformation
KW - Phonon softening
KW - Precursor phenomena
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U2 - 10.1080/14786430802029611
DO - 10.1080/14786430802029611
M3 - Article
AN - SCOPUS:46249134100
VL - 88
SP - 1027
EP - 1035
JO - Philosophical Magazine
JF - Philosophical Magazine
SN - 1478-6435
IS - 7
ER -