Invited Paper EM-WeA2
Strain-Enhanced Ferroelectrics and Multiferroics Grown by MBE*

Wednesday, October 17, 2007, 2:00 pm, Room 612

Aided by theoretical predictions, we have used epitaxy and the misfit strain imposed by an underlying substrate to enhance the ferroelectric properties of SrTiO₃, BaTiO₃, and BaTiO₃/SrTiO₃ superlattices grown by MBE. The enhancements include shifting the paraelectric-to-ferroelectric transition temperature by hundreds of degrees and maintaining ferroelectricity in BaTiO₃ layers as thin as one unit cell in BaTiO₃/SrTiO₃ superlattices. The effect of strain on EuTiO₃ will also be presented.

*Additional Authors: Biegalski, M.D., Oak Ridge National Laboratory; Soukiassian, A., Haeni, J.H., Lee, J.H., Ulbricht, R.W., Brooks, C.M., Jia, Y., Vaithyanathan, V., Tian, W., Ke, X., Tenne, D.A., Vasudevarao, A., Kumar, A., Tian, L., Sharan, A., Choudhury, S., Schiffer, P., Trolier-McKinstry, S., Xi, X.X., Gopalan, V., Chen, L.Q., Penn State University; Choi, K.J., Kim, D.M., Eom, C.B., University of Wisconsin-Madison; Chen, Y.B., Sun, H.P., Pan, X.Q., University of Michigan; Fong, D.D., Zurbuchen, M.A., Eastman, J.A., Fuoss, P.H., Streiffer, S.K., Argonne National Laboratory; Irvin, P., Levy, J., University of Pittsburgh; Chang, W., Kirchoefer, S.W., Naval Research Laboratory; Heeg, T., Schubert, J., Forschungszentrum Jülich GmbH, Germany; Bruchhausen, A., Lanzillotti-Kimura, N.D., Fainstein, A., Centro Atómico Bariloche & Instituto Balseiro, Argentina; Katiyar, R.S., University of Puerto Rico; Cantarero, A., University of Valencia, Spain; Li, Y.L., Hawley, M.E., Jia, Q.X., Los Alamos National Laboratory; Fennie, C.J., Nakhmanson, S.M., Rabe, K.M., Rutgers University; Tagantsev, A.K., Ecole Polytechnique Fédérale de Lausanne, Switzerland; Velickov, B., Uecker, R., Reiche, P., Institute for Crystal Growth, Germany