TY - JOUR
T1 - Neutron diffraction of liquid arsenic-tellurium mixtures near the semiconductor-metal transition
AU - Maruyama, K.
AU - Hoshino, H.
AU - Ikemoto, H.
AU - Miyanaga, T.
AU - Endo, H.
PY - 2002/10
Y1 - 2002/10
N2 - Neutron scattering measurements have been carried out for liquid As-Te mixtures containing 10, 20 and 30 at.% As in the temperature range between 400 and 600 °C. The local structure was analyzed by combining the information available from our previous EXAFS results. The partial coordination number for As-Te, nAs-Te, for the mixture containing 20 at.% As decreases from 3.0-2.5 at 400 °C to 2.0-1.7 at 600 °C, suggesting that a 'network-chain' structural transformation occurs on the semiconductor to metal transition at high temperature. We propose that the first sharp diffraction peak observed around 1.4 Å-1 in S(Q) indicates the presence of small chain clusters. It is found that the position of the second peak of g(r) shifts to smaller r at high temperature, which leads to volume contraction.
AB - Neutron scattering measurements have been carried out for liquid As-Te mixtures containing 10, 20 and 30 at.% As in the temperature range between 400 and 600 °C. The local structure was analyzed by combining the information available from our previous EXAFS results. The partial coordination number for As-Te, nAs-Te, for the mixture containing 20 at.% As decreases from 3.0-2.5 at 400 °C to 2.0-1.7 at 600 °C, suggesting that a 'network-chain' structural transformation occurs on the semiconductor to metal transition at high temperature. We propose that the first sharp diffraction peak observed around 1.4 Å-1 in S(Q) indicates the presence of small chain clusters. It is found that the position of the second peak of g(r) shifts to smaller r at high temperature, which leads to volume contraction.
UR - http://www.scopus.com/inward/record.url?scp=0036787960&partnerID=8YFLogxK
U2 - 10.1016/S0022-3093(02)01720-9
DO - 10.1016/S0022-3093(02)01720-9
M3 - 学術論文
AN - SCOPUS:0036787960
SN - 0022-3093
VL - 312-314
SP - 356
EP - 360
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
ER -