Low-temperature x-ray diffraction of the Y1Ba2Cu3O9-x oxide ceramic superconductor

Yin, Hua-qing; Gao, Yi-mei; Du, Jia-ju; Chen, Ben-pei; Jiang, Jian-yi; Wang, Xiang
May 1988
Applied Physics Letters;5/30/1988, Vol. 52 Issue 22, p1899
Academic Journal
The change of the lattice parameter with temperature (82–320 K) of the single phase Y1Ba2Cu3O9-x superconductor has been investigated by x-ray diffractometer. The experimental result shows that there exist two abrupt changes of lattice parameter at about 250 and 125 K separately in the curve of the lattice parameter versus temperature. But no change of structure symmetry was observed as shown by x-ray diffraction. The abrupt change of lattice parameter at about 250 and 125 K may be associated to the position adjusting of oxygen atoms in oxide ceramic.


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