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Single-Domain and Atomically Flat Surface of ?-Ga2O3 Thin Films on FZ-Grown ?-GaFeO3 Substrates via Step-Flow Growth Mode.


ABSTRACT: Herein, single-domain ?-Ga2O3 thin films were grown on FZ-grown ?-GaFeO3 substrates via a step-flow growth mode. The ?-GaFeO3 possessing the same crystal structure and similar lattice parameters as those of the orthorhombic ?-Ga2O3 facilitated the growth of ?-Ga2O3 thin films, as observed by the X-ray diffraction (XRD) analysis. Furthermore, the surface morphologies of the ?-Ga2O3 thin films exhibited a step-terrace and atomically flat structure. XRD ?-scan and transmission electron microscopy with selected area electron diffraction revealed that there is no occurrence of in-plane rotational domains in the ?-Ga2O3 thin films on ?-GaFeO3 substrates and that the ?-Ga2O3 thin film comprised a single domain. TEM analysis revealed that there were no clear dislocations in the observation area. Moreover, high-resolution TEM observation showed that the atomic arrangements of the film and the substrate were continuous without the presence of an intermediate layer along the growth direction and were well-aligned in the in-plane direction.

SUBMITTER: Nishinaka H 

PROVIDER: S-EPMC7676342 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature

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Single-Domain and Atomically Flat Surface of κ-Ga<sub>2</sub>O<sub>3</sub> Thin Films on FZ-Grown ε-GaFeO<sub>3</sub> Substrates via Step-Flow Growth Mode.

Nishinaka Hiroyuki H   Ueda Osamu O   Tahara Daisuke D   Ito Yusuke Y   Ikenaga Noriaki N   Hasuike Noriyuki N   Yoshimoto Masahiro M  

ACS omega 20201104 45


Herein, single-domain κ-Ga<sub>2</sub>O<sub>3</sub> thin films were grown on FZ-grown ε-GaFeO<sub>3</sub> substrates via a step-flow growth mode. The ε-GaFeO<sub>3</sub> possessing the same crystal structure and similar lattice parameters as those of the orthorhombic κ-Ga<sub>2</sub>O<sub>3</sub> facilitated the growth of κ-Ga<sub>2</sub>O<sub>3</sub> thin films, as observed by the X-ray diffraction (XRD) analysis. Furthermore, the surface morphologies of the κ-Ga<sub>2</sub>O<sub>3</sub> thin f  ...[more]

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