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Abstract: Ge0.7Mn0.3 thin films were fabricated on Al2O3 (0001) and glass substrates at growth temperatures ranging from room temperature to 500 °C by a radio frequency magnetron sputtering. We found that the Ge0.7Mn0.3 thin films showed a polycrystalline-to-amorphous transition at about 360 °C, and the ferromagnetic transition temperature of each thin film depends on its structure — crystalline or amorphous states. Particularly, the Ge0.7Mn0.3 thin films showed room temperature ferromagnetism when they were fabricated at temperatures above the crystallization temperature. [Copyright &y& Elsevier]

Abstract: We fabricate epitaxial terbium iron garnet (Tb3Fe5O12, TbIG) thin films on (110) gadolinium gallium garnet (Gd3Ga5O12, GGG) substrates using a pulsed laser deposition technique. High quality (110) oriented epitaxial growth of TbIG thin films has been revealed by θ–2θ scans, φ-scans, rocking curves (ω-scans), and reciprocal space mapping in high resolution X-ray diffraction. Magnetic and magneto-optic hysteresis loops, however, demonstrate that the easy axis of magnetization in these films is out-of-plane, i.e. along [110] instead of [1–11] direction, as sharp contrast to bulk. [Copyright &y& Elsevier]