Regensburg 2004 – wissenschaftliches Programm

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MA: Magnetismus

MA 20: Magnetische dünne Schichten II

MA 20.11: Vortrag

Donnerstag, 11. März 2004, 12:45–13:00, H10

Epitaxial growth and ferroelectric and ferromagnetic properties of La_0.7Sr_0.3MnO₃ / Pb(Zr,Ti)O₃ bilayers — •C. Thiele, K. Dörr, T. Walter, K.-H. Müller, and L. Schultz — IFW Dresden, Postfach 270116, 01171 Dresden

Magnetic and electrical properties of ferromagnetic manganites crucially depend on lattice constants. Thus, it was suggested to control epitaxial strain of thin films using the piezoeffect of a Pb(Zr,Ti)O₃ (PZT) toplayer [1]. Thereby, it seems possible to modify the resistivity in a wide temperature range including 300 K, the magnetoresistance and magnetization behavior of the ferromagnetic films. Pulsed laser deposition has been utilized to investigate the growth of La_0.7Sr_0.3MnO₃ / PZT bilayers on single-crystalline substrates in order to obtain high structural quality and undisturbed magnetic / ferroelectric properties. We discuss measurements of resistance, magnetization and ferroelectrical polarization in relation to the stoichiometry and microstructure of the bilayers. The latter was investigated by x-ray diffraction, atomic force microscopy and x-ray photoelectron spectroscopy.

This work is supported by DFG, FOR 520.

[1] H. Tabata et al., IEICE Trans. Electron. E80-C, 918 (1997).