Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1590948 | Science and Technology of Advanced Materials | 2006 | 5 Pages |
Abstract
The refinement results of neutron powder diffraction data for the high- and low-Tc phases indicate a small difference between the two phases in the interatomic distance of the C-C dimer, while the lattice parameter was constant for all samples. The values of dTc/dP were measured for the high-Tc phases (Tcâ15Â K) and low-Tc phases (Tcâ11Â K) by a clamp cell technique detecting the AC susceptibility of the sample. The Tc of Y2C3 systematically changes with applied hydrostatic pressure for both phases. However, the trends for the dTc/dPs are opposite: the value for the high-Tc phase is positive, and that for the low-Tc phase is negative. From these results, we concluded that the difference between the high-Tc and low-Tc phases in our Y2C3 samples did not originate in a simple contraction of the unit cell, but in the difference in the interatomic distances of the C-C dimers.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
T. Nakane, T. Naka, T. Mochiku, H. Kito, S. Harjo, T. Ishigaki, T. Kamiyama, H. Takeya, H. Fujii, T. Wada, A. Matsushita, H. Kumakura, Y. Takano,