Phase Diagrams in the Solid Solution Nd-Ba-Cu-O System and NdBa_2Cu_3O_<7-δ> Single Crystals Growth by the Traveling-Solvent Floating-Zone Method

概要

論文の詳細を見る
We have investigated the pseudo-binary phase diagrams between NdBa_2Cu_3O_<7-δ> (Nd123) and several Ba-Cu-O compositions in air and reduced oxygen atmosphere by DTA, quenching, and X-ray powder diffraction measurements. We found that in air the wider liquidus line exists in the 60-90% concentration of (1/13) Ba_3Cu_<10>O_<13> [40-10% (1/6) Nd123] at 940-1090℃. Under 0.1% O_2 in Ar, the liquidus line on the same pseudo-binary line shifts to the 65-92.5% concentration of (1/13) Ba_3Cu_<10>O_<13> [35-7.5% (1/6) Nd123] at 850-1000℃. Furthermore, we tried to grow single crystals of Nd123 based on these phase diagrams by traveling-solvent floating-zone method under 0.1% O_2 in Ar. We could get a single crystal rod having the composition of Nd_<1.02>Ba_<1.98>Cu_3O_<7-δ> and the T_C〜93 K in all through the length of the crystal rod.
社団法人応用物理学会の論文
1997-11-15