K. Tokiwa et al., SYNTHESIS OF HGBA2CA3CU4O10-1234) AND HGBA2CA4CU5O12+DELTA(HG-1245) FROM OXYGEN CONTROLLED PRECURSORS UNDER HIGH-PRESSURE(DELTA(HG), Czechoslovak journal of Physics, 46, 1996, pp. 1491-1492
Effects of oxygen content in the precursor have been investigated on t
he synthesis of HgBa2Ca4Cu5O12+delta(Hg-1245) under high pressure. The
superconducting phases continuously changed from Hg-1234 to Hg-1245 w
ith reducing the oxygen content in the precursor of Ba2Ca4Cu5O11+delta
. Samples of Hg-1245 have been synthesized by optimizing the oxygen co
ntent of the precursor with the stoichiometrical composition.