Table 4. Parameters of Fits Obtained from the Temperature Dependence of the Emission Intensity (Equation 2) for Mn⁴⁺ Emission in (Al_1–xGa_x)₂O₃.

sample composition (x value)	ΔE1, meV	ΔE2, meV	T1/2,a K
0	148 ± 7	1029 ± 6	380
0.05	91 ± 27	727 ± 210	370
0.1	190 ± 15	666 ± 40	336
0.15	186 ± 86	657 ± 89	336
0.2	90 ± 10	416 ± 17	285
0.25	16 ± 3	272 ± 24	262
0.5	14 ± 11	285 ± 50	247
0.75	11 ± 3	142 ± 17	174
1.0		147 ± 14	114
1.0b	7 ± 2	100 ± 12	132

^aTemperature when the I(T) intensity is half of I(0).

^bα-Ga₂O₃:Mn⁴⁺.