Regensburg 2007 – wissenschaftliches Programm
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SYSE: Symposium Strain-Engineering for New Functional Structures
SYSE 2: Strain engineering in ferroics and photonics
SYSE 2.1: Hauptvortrag
Montag, 26. März 2007, 16:15–16:45, H1
Enhancing Ferroelectrics and Multiferroics using Strain — •D.G. Schlom1, M.D. Biegalski1, A. Soukiassian1, J.H. Haeni1, J.H. Lee1, R.W. Ulbricht1, C.M. Brooks1, Y. Jia1, V. Vaithyanathan1, W. Tian1, X. Ke1, D.A. Tenne1, A.V. Rao1, A. Kumar1, L. Tian1, A. Sharan1, S. Choudhury1, Y.L. Li1, P. Schiffer1, S. Trolier-McKinstry1, X.X. Xi1, V. Gopalan1, L.Q. Chen1, K.J. Choi2, D.M. Kim2, C.B. Eom2, Y.B. Chen3, H.P. Sun3, X.Q. Pan3, D.D. Fong4, M.A. Zurbuchen4, J.A. Eastman4, P.H. Fuoss4, S.K. Streiffer4, P. Irvin5, J. Levy5, W. Chang6, S.W. Kirchoefer6, T. Heeg7, J. Schubert7, A. Bruchhausen8, N.D. Lanzillotti-Kimura8, A. Fainstein8, R.S. Katiyar9, A. Cantarero10, M.E. Hawley11, Q.X. Jia11, C.J. Fennie12, S.M. Nakhmanson12, K.M. Rabe12, A.K. Tagantsev13, B. Velickov14, R. Uecker14, and P. Reiche14 — 1Penn State U. — 2U. Wisconsin-Madison — 3U. Michigan — 4Argonne — 5U. Pittsburgh — 6NRL — 7FZ Jülich — 8Centro Atómico Bariloche and Instituto Balseiro — 9U. Puerto Rico — 10U. Valencia — 11Los Alamos — 12Rutgers U. — 13EPFL — 14Institut für Kristallzüchtung
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. 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.