Strong-Gravity Effect on Twinned Y1Ba2Cu3O7-x Single Crystal
Ultracentrifuge experiments were performed on the twinned Y1Ba2Cu3O7-x (Y123) single crystal at much lower temperatures than the melting point. Two layers structure with slightly different compositions was observed in the sample ultracentrifuged at 250°C(380,000 G), which might be due to the sedimentation of atoms. In the strong gravity layer, it was found that the Y123 phase disappeared, and unknown XRD peaks appeared. Decomposition occurred in the sample ultracentrifuged at 400°C.
A. Agüero, J.M. Albella, M.P. Hierro, J. Phillibert and F.J. Pérez Trujillo
R. Bagum et al., "Strong-Gravity Effect on Twinned Y1Ba2Cu3O7-x Single Crystal", Defect and Diffusion Forum, Vols. 289-292, pp. 517-521, 2009