PREPARATION OF SINGLE-CRYSTAL OF CA2CUO3 BY TSFZ METHOD

A bulky (7X3X3 mm(3)) single crystal of Ca2CuO3 has been successfully prepared by the traveling-solvent-floating-zone (TSFZ) method using Cu O excess solvent. An optimum solvent composition for growth of the tit led compound was found to be around 9 in CuO/CaO molar ratio R under 0 .1 MPa oxygen partial pressure. The obtained R value considerably devi ates from the estimated one based on the reported equilibrium phase di agrams. Anisotropic magnetic susceptibilities of the prepared single c rystal were observed, In particular an anomalous thermal behaviour of the susceptibility under the magnetic field along [001] and [010] indi cates an appearance of three-dimensional antiferromagnetic order below around 8 K.