Structural stability of β-Ga2O3 under ion irradiation

Alexander Petkov; David Cherns; Wei-Yin Chen; Junliang Liu; John Blevins; Vincent Gambin; Meimei Li; Dong Liu; Martin H H Kuball

doi:10.1063/5.0120089

Structural stability of β-Ga₂O₃ under ion irradiation

Alexander Petkov, David Cherns, Wei-Yin Chen, Junliang Liu, John Blevins, Vincent Gambin, Meimei Li, Dong Liu, Martin H H Kuball^*

^*Corresponding author for this work

Research output: Contribution to journal › Article (Academic Journal) › peer-review

7 Citations (Scopus)

Abstract

β-Ga₂O₃ was suggested to have excellent irradiation hardness which makes β-Ga₂O₃-based devices extremely attractive for nuclear and space applications. To discern the fundamental nano-scale structural changes with irradiation, an in situ irradiation experiment in a transmission electron microscope was carried out using 400 keV Ar ions of fluences up to 8 × 10¹⁵ cm⁻² (equivalent to four displacements per atom). Contrary to previous works, which indicate a phase transition of β-Ga₂O₃ into the κ polymorph, the β-Ga₂O₃ structure was found to remain intact throughout except for (i) anisotropic lattice distortions, which are most significant at low levels of irradiation, and (ii) the appearance of additional weak reflections above 2 dpa irradiation. The origin of the extra reflections is discussed.

Original language	English
Article number	171903
Number of pages	6
Journal	Applied Physics Letters
Volume	121
Issue number	17
DOIs	https://doi.org/10.1063/5.0120089
Publication status	Published - 26 Oct 2022

Bibliographical note

The authors gratefully acknowledge the NSUF Rapid
Turnaround Experiment Scheme for access to IVEM-Tandem User
Facility, Argonne National Laboratory, USA. The authors also
thank Mr. Peter Baldo (ANL, USA) for dedication on the operation
of the ion accelerator during the experiment. M.K. was supported
by the Royal Academy of Engineering through the Chair in
Emerging Technologies Scheme. D.L. was supported by the EPSRC
funding (Nos. EP/N004493/2 and EP/T000368/1).

Structured keywords

CDTR

Access to Document

10.1063/5.0120089Licence: CC BY

Handle.net

Persistent link

Cite this

@article{f2d9ca4a16a34b198120415967544223,

title = "Structural stability of β-Ga2O3 under ion irradiation",

abstract = "β-Ga2O3 was suggested to have excellent irradiation hardness which makes β-Ga2O3-based devices extremely attractive for nuclear and space applications. To discern the fundamental nano-scale structural changes with irradiation, an in situ irradiation experiment in a transmission electron microscope was carried out using 400 keV Ar ions of fluences up to 8 × 1015 cm−2 (equivalent to four displacements per atom). Contrary to previous works, which indicate a phase transition of β-Ga2O3 into the κ polymorph, the β-Ga2O3 structure was found to remain intact throughout except for (i) anisotropic lattice distortions, which are most significant at low levels of irradiation, and (ii) the appearance of additional weak reflections above 2 dpa irradiation. The origin of the extra reflections is discussed.",

author = "Alexander Petkov and David Cherns and Wei-Yin Chen and Junliang Liu and John Blevins and Vincent Gambin and Meimei Li and Dong Liu and Kuball, {Martin H H}",

note = "The authors gratefully acknowledge the NSUF Rapid Turnaround Experiment Scheme for access to IVEM-Tandem User Facility, Argonne National Laboratory, USA. The authors also thank Mr. Peter Baldo (ANL, USA) for dedication on the operation of the ion accelerator during the experiment. M.K. was supported by the Royal Academy of Engineering through the Chair in Emerging Technologies Scheme. D.L. was supported by the EPSRC funding (Nos. EP/N004493/2 and EP/T000368/1).",

year = "2022",

month = oct,

day = "26",

doi = "10.1063/5.0120089",

language = "English",

volume = "121",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics (AIP)",

number = "17",

}

TY - JOUR

T1 - Structural stability of β-Ga2O3 under ion irradiation

AU - Petkov, Alexander

AU - Cherns, David

AU - Chen, Wei-Yin

AU - Liu, Junliang

AU - Blevins, John

AU - Gambin, Vincent

AU - Li, Meimei

AU - Liu, Dong

AU - Kuball, Martin H H

N1 - The authors gratefully acknowledge the NSUF Rapid Turnaround Experiment Scheme for access to IVEM-Tandem User Facility, Argonne National Laboratory, USA. The authors also thank Mr. Peter Baldo (ANL, USA) for dedication on the operation of the ion accelerator during the experiment. M.K. was supported by the Royal Academy of Engineering through the Chair in Emerging Technologies Scheme. D.L. was supported by the EPSRC funding (Nos. EP/N004493/2 and EP/T000368/1).

PY - 2022/10/26

Y1 - 2022/10/26

N2 - β-Ga2O3 was suggested to have excellent irradiation hardness which makes β-Ga2O3-based devices extremely attractive for nuclear and space applications. To discern the fundamental nano-scale structural changes with irradiation, an in situ irradiation experiment in a transmission electron microscope was carried out using 400 keV Ar ions of fluences up to 8 × 1015 cm−2 (equivalent to four displacements per atom). Contrary to previous works, which indicate a phase transition of β-Ga2O3 into the κ polymorph, the β-Ga2O3 structure was found to remain intact throughout except for (i) anisotropic lattice distortions, which are most significant at low levels of irradiation, and (ii) the appearance of additional weak reflections above 2 dpa irradiation. The origin of the extra reflections is discussed.

AB - β-Ga2O3 was suggested to have excellent irradiation hardness which makes β-Ga2O3-based devices extremely attractive for nuclear and space applications. To discern the fundamental nano-scale structural changes with irradiation, an in situ irradiation experiment in a transmission electron microscope was carried out using 400 keV Ar ions of fluences up to 8 × 1015 cm−2 (equivalent to four displacements per atom). Contrary to previous works, which indicate a phase transition of β-Ga2O3 into the κ polymorph, the β-Ga2O3 structure was found to remain intact throughout except for (i) anisotropic lattice distortions, which are most significant at low levels of irradiation, and (ii) the appearance of additional weak reflections above 2 dpa irradiation. The origin of the extra reflections is discussed.

U2 - 10.1063/5.0120089

DO - 10.1063/5.0120089

M3 - Article (Academic Journal)

SN - 0003-6951

VL - 121

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 17

M1 - 171903

ER -