Growth of delafossite CuAlO2 single crystals in a reactive crucible
- Authors
- Kim, Du Hyung; Kong, Minsik; Kang, Myeongjun; Kim, Minjae; Kim, Seohee; Kim, Youngwook; Yoon, Sangmoon; Ok, Jong Mok
- Issue Date
- Jan-2023
- Publisher
- IOP Publishing Ltd
- Keywords
- delafossite; growth mechanism; CuAlO2
- Citation
- JOURNAL OF PHYSICS-CONDENSED MATTER, v.35, no.2
- Journal Title
- JOURNAL OF PHYSICS-CONDENSED MATTER
- Volume
- 35
- Number
- 2
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/86277
- DOI
- 10.1088/1361-648X/ac98e9
- ISSN
- 0953-8984
- Abstract
- Delafossite oxide CuAlO2 has received great attention as a promising p-type conducting oxide. In this work, high-quality CuAlO2 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 CuAlO2 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 CuAlO2 with a few mm size is important for new technologies that demand p-type semiconductor-based device fabrication.
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