Growth of CuFeO$_2$ Single Crystals by the Optical Floating-Zone Technique

Nora Wolff; Tobias Schwaigert; Dietmar Siche; Darrell G. Schlom; Detlef Klimm

doi:10.1016/j.jcrysgro.2019.125426

Growth of CuFeO$_2$ Single Crystals by the Optical Floating-Zone Technique

Materials Science 2020-01-07 v1

Authors: Nora Wolff , Tobias Schwaigert , Dietmar Siche , Darrell G. Schlom , Detlef Klimm

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Abstract

CuFeO $_2$ single crystals up to 50 mm in length and up to 10 mm in diameter were grown by the optical floating-zone method. Stoichiometric polycrystalline rods with a diameter of 6-12 mm were used as feed materials to produce crystals of sufficient size to be used as substrates for the growth of thin films of delafossites. For stable growth along the $c$ -axis, low growth rates of 0.4 mm/h are necessary. Due to the incongruent melting behavior of CuFeO $_2$ , a stable melt zone requires adjustment of the lamp power during growth. The melting of CuFeO $_2$ is not simply incongruent because the thermodynamic equilibrium includes more than two solid phases and the melt; the gas phase is also involved. The crystals were characterized by X-ray diffraction and X-ray fluorescence measurements.

Keywords

cuFeO2 single crystal growth optical floating-zone incongruent melting x-ray diffraction delafossite substrate

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@article{arxiv.1912.09752,
  title  = {Growth of CuFeO$_2$ Single Crystals by the Optical Floating-Zone Technique},
  author = {Nora Wolff and Tobias Schwaigert and Dietmar Siche and Darrell G. Schlom and Detlef Klimm},
  journal= {arXiv preprint arXiv:1912.09752},
  year   = {2020}
}

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17 pages, 5 figures, 1 table

Growth of CuFeO$_2$ Single Crystals by the Optical Floating-Zone Technique

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