I. Vrejoiu, M. Ziese, A. Setzer, B. I. Birajdar, E. Pippel, D. Hesse, M. Alexe
Epitaxial ferromagnetic La0.7Sr0.3MnO3 / ferroelectric PbZr0.2Ti0.8O3 (LSMO/PZT) superlattices were grown on SrTiO3 (100) substrates by pulsed laser deposition, in an attempt to build artificial multiferroic interfaces (Fig 1). Superlattices with 5 nm LSMO layers retain a good ferromagnetic behavior below 330 K (Fig 2). This type of superlattices is under investigation for potential magneto-electric coupling between the ferroelectric and ferromagnetic layers.
Fig. 1: Cross section high-resolution TEM image of a coherently grown LSMO/PZT superlattice with an individual layer thickness of 5 nm. The inset in the upper right corner is a Z-contrast STEM image of one of the PZT/LSMO interfaces (TITAN 80-300).
Fig. 2: SQUID magnetization hysteresis loops measured at different temperatures on the LSMO/PZT superlattice from Fig. 1.