Abstract
Shock-recovery experiments were conducted on β-Ga2O3 using a plate impact technique. The recovered sample was characterized using X-ray diffraction (XRD) and Raman spectroscopy. The XRD pattern and Raman spectrum of a Ga2O3 sample shocked at 21 GPa indicated a shock-induced monoclinic (β) to corundum (α) phase transition. In contrast to static compression, the coexistence of β and α phases was observed by shocking at 39 GPa. In addition, the fraction of β phase in the sample shocked at 39 GPa was larger than that observed in a sample shocked at 36 GPa. The regrowth of the β phase could be due to a shock-induced increase of temperature. The wide pressure range of the mixed phases implies the pressure-induced β- to α-Ga2O3 transition was sluggish.
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