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Nanosized Y3Fe5O12 epitaxial films have been grown on Nd3Ga5O12 substratesusing laser molecular beam epitaxy method. Magneto-optical polar Kerr effect,ferromagnetic resonance and spin wave propagation measurements show that thestress-related anisotropy field has an opposite sign, compared to that in theYIG/GGG systems. This leads to a considerable decrease of the effectivemagnetization that opens a perspective to get YIG films with perpendicularmagnetization for utilizing forward volume spin waves. Longitudinalmagnetooptical Kerr effect magnetometry reveals a large contribution ofquadratic in magnetization terms into dielectric permittivity tensor at opticalfrequencies. This effect strongly increases with temperature decrease and isexplained by magnetization of the interface Nd3+ ions that are exchange coupledto the Fe3+ ions.

Substrate induced magnetic anisotropies and magneto-optical response in YIG nanosized epitaxial films on NdGG(111)