Abstract
We have studied the influence of the relative film-substrate lattice mismatch in the 0.5–0.85% range on the behavior of coercivity in epitaxial garnet ferrite (EGF) films with compositions (Bi, Sm, Lu, Ca)3(Fe, Sc, Ga, Al)5O12 grown on (111)-oriented gadolinium gallium garnet (GGG) substrates. As the relative film-substrate lattice mismatch increases, the coercivity of EGF films initially grows, passes through a maximum, and then decreases. The maximum in the coercivity is related to periodic localized stresses caused by the formation of a misfit dislocation network whose period is comparable with the width of domain walls. The period of localized stresses is determined by the relative lattice mismatch between the EGF film and the GGG substrate.
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Translated from Pis’ma v Zhurnal Tekhnichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 31, No. 22, 2005, pp. 68–73.
Original Russian Text Copyright © 2005 by Dubinko, Nedviga, Vishnevski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \), Shaposhnikov, Yagupov, Nesteruk, Prokopov.
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Dubinko, S.V., Nedviga, A.S., Vishnevskii, V.G. et al. Features of the coercivity of strained epitaxial garnet ferrite films. Tech. Phys. Lett. 31, 979–981 (2005). https://doi.org/10.1134/1.2136971
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DOI: https://doi.org/10.1134/1.2136971