%0 Journal Article %K Thin films %K Epitaxial growth %K Ferroelectricity %K Magnetization %K Magnetoelectric coupling %K Atomic-level engineering %K Interfacial coupling %K Thin-film multiferroics %A Ramamoorthy Ramesh %A N.A Spaldin %B Nature Materials %D 2007 %G eng %P 21-29 %R 10.1038/nmat1805 %T Multiferroics: Progress and prospects in thin films %V 6