High Pressure-Induced Phase Transition In [beta]-Ga[subscript 2]O[subscript 3]: in situ Synchrotron X-Ray Diffraction Studies up to 70 Gpa
- UNLV
A renewed interest in {beta}-Ga{sub 2}O{sub 3} has arisen since it has potential applications in optoelectronic devices. We performed in situ synchrotron radiation x-ray diffraction studies in a diamond anvil cell on {beta}-Ga{sub 2}O{sub 3} on compression up to 70 GPa and on successive decompression. The pressure-evolution of x-ray diffraction patterns was consistent with a low-to-high density phase transition. A thermodynamically stable {beta}-Ga{sub 2}O{sub 3} phase was converted into the {alpha}-Ga{sub 2}O{sub 3} phase, which is unstable at ambient conditions. The effect of hydrostatic and non-hydrostatic compression conditions on the evolution of the phase transition was also investigated in compression and decompression cycles. This work is the first report of high-pressure investigations of Ga{sub 2}O{sub 3} on compression up to 70 GPa.
- Research Organization:
- Advanced Photon Source (APS), Argonne National Laboratory (ANL), Argonne, IL (US)
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 1008994
- Country of Publication:
- United States
- Language:
- ENGLISH
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