Laser floating zone growth of SrVO₃ single crystals

The perovskite SrVO$_3$ is of interest for a variety of applications due to its simple metallic character and stability in reducing environments. Here we report the preparation of single-crystal SrVO$_3$ using the laser floating zone technique. Laue diffraction implies single domains ca. 30 mm in length. The stoichiometry of optimized crystals was found to be Sr$_{0.985}$VO$_{2.91}$ using inductively coupled plasma optical emission spectrometry and neutron powder diffraction analysis, with compositions adjustable depending on the crystal pulling rate. Heat capacity measurements from 2 to 300 K show variations with composition, attributable to a combination of impurity scattering and changes in phonon dynamics.Our results demonstrate the utility of the laser floating zone technique in preparing a range of materials, and our advances with SrVO$_3$ may help lead to applications including catalysis, transparent conducting oxides, thermionic emitters, and other electronic devices.