Growth of delafossite CuAlO 2 single crystals in a reactive crucible

Abstract Delafossite oxide CuAlO 2 has received great attention as a promising p-type conducting oxide. In this work, high-quality CuAlO 2 single crystals with a size of several millimeters (mm) are successfully synthesized with a reactive crucible melting method. The crystals are characterized by x...

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Published inJournal of physics. Condensed matter Vol. 35; no. 2; p. 24002
Main Authors Kim, Du Hyung, Kong, Minsik, Kang, Myeongjun, Kim, Minjae, Kim, Seohee, Kim, Youngwook, Yoon, Sangmoon, Ok, Jong Mok
Format Journal Article
LanguageEnglish
Published 18.01.2023
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Summary:Abstract Delafossite oxide CuAlO 2 has received great attention as a promising p-type conducting oxide. In this work, high-quality CuAlO 2 single crystals with a size of several millimeters (mm) are successfully synthesized with a reactive crucible melting method. The crystals are characterized by x-ray diffraction, scanning electron microscopy with energy-dispersive spectroscopy, transport measurement, and magnetic susceptibility measurement. The CuAlO 2 single crystals show semiconducting behavior with hole carriers, which is consistent with other crystals grown by the conventional slow-cooling method. This growth method we reported here eliminates the process of removing the remaining flux, allowing easy access to the high-quality single crystals. This new approach to growing high-quality delafossite oxide CuAlO 2 with a few mm size is important for new technologies that demand p-type semiconductor-based device fabrication.
ISSN:0953-8984
1361-648X
DOI:10.1088/1361-648X/ac98e9