Formation of multiferroic thin-film heterostructure (BiAl:YIG/La:PMNT) via a wet chemical process


A novel multiferroic thin-film heterostructure exhibiting both ferromagnetic (FM) and ferroelectric (FE) properties, as well as magneto-optic (MO) and electro-optic (EO) properties, was fabricated via a wet chemical route. Oxide buffer layers were used to allow the growth of ferroelectric lanthanum modified lead magnesium niobate titanate (La:PMNT) layer on top of ferromagnetic bismuth and aluminum substituted yttrium iron garnet (BiAl:YIG). X-ray diffractometer (XRD) analysis confirmed the formation of both crystalline structures. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) were used to examine the surface and cross-section morphologies of the resulted heterostructure. Multiferroic properties of the film were investigated.

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This work was performed with government supports under the National Aeronautics and Space Administration (NASA) grant NNG04CB08C, and National Science Foundation (NSF) grants DMI-0422094 and DMI-0522177. We are grateful to X. Qi, S.Y. Sung, and B.J.H. Stadler (University of Minnesota) for magnetic property measurements. Also we want to thank Dr. J. Qi (MIT) for helpful discussion.

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Correspondence to Xiaomei Guo.

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Guo, X., Zou, Y.K., Li, K.K. et al. Formation of multiferroic thin-film heterostructure (BiAl:YIG/La:PMNT) via a wet chemical process. Journal of Materials Research 22, 2125–2129 (2007).

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