Abstract
Abstract Spin ladder compounds Sr 14- x Ca x Cu 24 O 41 (SCCO) single crystals have been grown under different oxygen pressures by an optical floating-zone technique. The effects of oxygen pressure on the crystal growth and properties of SCCO were studied. The SCCO single crystals with x ≤8 can be grown in a flowing oxygen atmosphere. But the growth of the SCCO compounds with higher Ca content ( x >8) needs higher pressure (0.9 MPa). The single crystals were characterized by means of XRD, EDX and resistivity measurement. High pressure is in favor of forming of higher Ca-doped SCCO single crystals. SCCO single crystals grown under different oxygen pressures have almost the same quality.
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