Abstract
Thin films with different compositions of Ce-substituted yttrium iron garnet (Ce:YIG (Y 2CeFe 5O 12)), Ga-doped Ce:YIG (Ce:Ga:YIG (Y 2CeFe 4.25Ga 0.75O 12)), and Gd-doped Ce:YIG (Ce:Gd:YIG (Y 1.6CeGd 0.4Fe 5O 12)) were deposited on gadolinium gallium garnet (GGG (Gd 3Ga 5O 12)) substrates in O 2 or Ar background gas by pulsed-laser deposition (PLD) technique. Crystalline films were obtained at a lower O 2 gas pressure of 20 mTorr or at higher Ar gas pressures of more than 100 mTorr. In addition, the behavior of YO molecules was visualized by two-dimensional laser-induced fluorescence (2D-LIF), in order to investigate the oxidation dynamics in the ablation plume. The oxidation dynamics and the crystallinity had close correlation.
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