High-pressure structure study of CuBa2Ca3Cu4O10+delta superconductor

摘要

In-situ high-pressure energy dispersive X-ray diffraction measurements on CuBa2-Ca3Cu4O10+δ(Cu-1234) have been performed by using diamond anvil cell (DAC) device with synchrotron radiation. The results suggest that the crystal structure of Cu-1234 superconductor is stable under pressures up to 34 GPa at room temperature. According to the Birch-Murnaghan equation of state, the bulk modulus is obtained to be ∼ 150 GPa.