Al3+ content, | Wave-number( cm−1) | Wave-number (cm−1) | Wave-number (cm−1) | |||
x | for Pr3+-Al3+ samples | for Sm3+-Al3+-doped samples | for Gd3+-Al3+-doped samples | |||
Peak 1 | Peak 2 | Peak 1 | Peak 2 | Peak 1 | Peak 2 | |
0.0 | 447.40 | 609.40 | 447.40 | 609.4 | 447.40 | 609.40 |
0.5 | 455.12 | 617.11 | 455.12 | 617.11 | 445.12 | 617.11 |
1.0 | 462.83 | 624.82 | 455.12 | 617.11 | 455.12 | 617.11 |
1.5 | 462.83 | 624.82 | 455.12 | 624.82 | 462.83 | 624.82 |
2.0 | 470.55 | 632.54 | 462.83 | 624.82 | 462.83 | 624.82 |