Robust perpendicular magnetic anisotropy in Ce substituted yttrium iron\n garnet epitaxial thin films

Cerium substituted yttrium iron garnet (Ce:YIG) epitaxial thin films are\nprepared on gadolinium gallium garnet (GGG) substrate with pulsed laser\ndeposition (PLD). It is observed that the films grown on GGG(111) substrate\nexhibit perpendicular magnetic anisotropy (PMA) as compared to films grown on\nGGG(100) substrate. The developed PMA is confirmed from magneto-optical Kerr\neffect, bulk magnetization and ferromagnetic resonance measurements. Further,\nthe magnetic bubble domains are observed in the films exhibiting PMA. The\nobservations are explained in terms of the growth direction of Ce:YIG films and\nthe interplay of various magnetic anisotropy terms. The observed PMA is found\nto be tunable with thickness of the film and a remarkable temperature stability\nof the PMA is observed in all the studied films of Ce:YIG deposited on GGG(111)\nsubstrate.\n