Highly ordered L10 FePt–SiO2 granular films with a (001)-preferred orientation were obtained by depositing atomic-scale [Fe∕Pt∕SiO2(tox)] multilayers on glass substrates and subsequently annealing multilayers at the temperature of as low as 350°C. The tox value plays an important role on both microstructure and magnetic properties. The average grain sizes of samples A, B, and C (tox=0.11,0.28,0.56) are 12.12, 15.46, and 5.14nm, respectively, and the corresponding perpendicular coercivities are 6800, 5550, and 7700Oe. Due to different microstructures, samples show distinct coercivity dependence on annealing time.
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Wu et al. (2008) studied this question.
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