Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Growth optimization of CeCoIn5 thin films via pulsed laser deposition

  • Rivasto, Elmeri (Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku) ;
  • Kim, Jihyun (Institute of Basic Science, Sungkyunkwan University) ;
  • Tien, Le Minh (Department of Physics, Sungkyunkwan University) ;
  • Kang, Ji-Hoon (Department of Physics, Sungkyunkwan University) ;
  • Park, Sungmin (Department of Physics, Sungkyunkwan University) ;
  • Choi, Woo Seok (Department of Physics, Sungkyunkwan University) ;
  • Kang, Won Nam (Department of Physics, Sungkyunkwan University) ;
  • Park, Tuson (Department of Physics, Sungkyunkwan University)
  • Received : 2021.06.21
  • Accepted : 2021.09.17
  • Published : 2021.09.30
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Abstract

We developed an optimization process of the pulsed laser deposition method to grow epitaxial CeCoIn5 thin films on MgF2 substrates. The effects of different deposition parameters on film growth were extensively studied by analyzing the measured X-ray diffraction patterns. All the deposited films contained small amounts of CeIn3 impurity phase and misoriented CeCoIn5, for which the c-axis of the unit cell is perpendicular to the normal vector of the substrate surface. The deposition temperature, target composition, laser energy density, and repetition rate were found effective in the formation of (00l)-oriented CeCoIn5 as well as the undesired phases such as CeIn3, misoriented CeCoIn5 along the (112) and (h00). Our results provide a set of deposition parameters that produce high-quality epitaxial CeCoIn5 thin films with sufficiently low amounts of impurity phases and can serve as a reference for future studies to optimize the deposition process further.

Keywords

Acknowledgement

This work was supported by the National Research Foundation (NRF) of Korea through a grant funded by the Korean Ministry of Science and ICT (No. 2012R1A3A2048816, 2021R1A2C2011340 (W.S.C.)). E. R. thanks the University of Turku Graduate School (UTUGS), the Magnus-Ehrnrooth foundation, and the Turku University Foundation for financial support. Sungmin Park was supported by Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Education (2018R1D1A1B07051040).

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