Magnetic vortex evolution in self-assembled La0.7Sr 0.3MnO3 nanoislands under in-plane magnetic field

The magnetic vortex formation at room temperature and its evolution under in-plane magnetic field is studied in chemically grown self-assembled La 0.7Sr0.3MnO3 nanoislands of less than 200 nm in width. We use variable field magnetic force microscopy and numerical simulations to confirm that the vortex state is ubiquitous in these square-base pyramid shape epitaxial La0.7Sr0.3MnO3 nanostructures, and that it requires in-plane magnetic fields below 40 kA/m to be annihilated.Financial support from Spanish MICINN (MAT2011-29874-C02-01, Consolider: NANOSELECT CSD2007-00041 and CSD2010-00024), and Generalitat de Catalunya (2009 SGR 770 and Xarmae) are acknowledged. J.Z. acknowledges FPU Ph.D. grant from Spanish MICINN.Peer reviewe

Magnetic vortex evolution in self-assembled La₀.₇Sr₀.₃MnO₃ nanoislands under in-plane magnetic field

The magnetic vortex formation at room temperature and its evolution under in-plane magnetic field is studied in chemically grown self-assembled La₀.₇Sr₀.₃MnO₃ nanoislands of less than 200 nm in width. We use variable field magnetic force microscopy and numerical simulations to confirm that the vortex state is ubiquitous in these square-base pyramid shape epitaxial LaSrMnO nanostructures, and that it requires in-plane magnetic fields below 40 kA/m to be annihilated