Abstract

A large single crystal (5mm x 4 mm x 15 mm) of CuNb 2 O 6 has been grown in a four-mirror-type optical floating-zone furnace by the traveling solvent floating zone (TSFZ) method using a composition having excess CuO as flux. The as-grown single crystal was found to be phase-pure orthorhombic β-CuNb 2 O 6 , excellent in quality and with a spontaneous growth direction along the crystallographic b-axis. A novel growth mechanism as observed for β-CuNb 2 O 6 in the floating-zone machine is illustrated, and characteristics of the magnetic susceptibility and magnetization along different crystallographic axes are also shown.

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