Effect of Ar ion irradiation on the room temperature ferromagnetism of undoped and Cu-doped rutile TiO<sub>2</sub> single crystals

Effect of Ar ion irradiation on the room temperature ferromagnetism of undoped and Cu-doped rutile TiO₂ single crystals

Xu Nan-Nan¹, Li Gong-Ping^{1, 2, †,}, Lin Qiao-Lu¹, Liu Huan¹, Bao Liang-Man³

UV–vis absorption spectra of the four SCs. The encircled portion denotes a new absorption band at around 660 nm.