Abstract
We report on the growth of terbium iron garnet (TbIG, Tb 3Fe 5O 12) thin films having anomalously large coercivity and in-plane easy axis of magnetization. The TbIG thin films were prepared at room temperature (RT) on Pt/Si(1 0 0) substrates by pulsed laser deposition technique. The films deposited at RT were X-ray amorphous and do not show any magnetic order. Annealing of the RT deposited film at 900 °C resulted into fully textured (532) TbIG film. Atomic force microscopy and cross-sectional scanning electron microscopy studies of the TbIG films showed good surface quality with an average surface roughness of 5.0 nm and thickness of about 300 nm, respectively. The M– H loops measured at 20 K for TbIG films, exhibit about an order of magnitude enhancement in the coercivity value ( H c) than the single crystal. In-plane and out-of-plane M– H loops revealed that the easy axis of the magnetization lies within the film’s plane. In-plane magnetization combining with large H c value of the TbIG thin film may be of scientific interest for the possible applications.
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