Novel afterglow phosphors based on the GdSr2AlO5 host were prepared by solid-state reaction under reductive atmosphere. The photoluminescence, afterglow, thermoluminescence and magnetism properties of GdSr2AlO5:RE3+ (RE3+ = Eu3+, Sm3+, Pr3+ and Dy3+) were discussed in detail for the first time in this paper. By doping appropriate rare earth ions into the GdSr2AlO5 host, all phosphors showed a satisfactory long-wavelength afterglow phenomenon and excellent paramagnetism characteristics. The mass magnetic susceptibility value was determined to be approximately 4.4052 × 10−5 emu g−1 Oe−1.
