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Efficient spin transfer torque in La2/3Sr1/3MnO3 nanostructures

Foerster, Michael; Peña, Luis; Vaz, C. A. F.; Heinen, Jan; Finizio, Simone; Schulz, Tomek; Bisig, André; Büttner, Felix; Eisebitt, Stefan; Méchin, Laurence; Hühn, Sebastian; Moshnyaga, Vasily; Kläui, Mathias

We carry out low temperature magnetotransport measurements on nanostructured La2/3Sr1/3MnO3 wires to study the interaction between spin-polarized current and magnetization in this half metallic material. We selectively position domain walls by applying external fields. The domain wall resistance is found to be positive, in contrast to conventional 3d metals. The depinning field is reduced when current pulses are injected into the wire. By comparing measurements for both current polarities, we can disentangle heating and spin transfer torque effects. The determined spin transfer torque efficiency is of the order of 4 × 10−14 Tm2/A, which is significantly higher than in permalloy.
Published in: Applied Physics Letters (APL), 10.1063/1.4865415, American Institute of Physics (AIP)
  • This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This material originally appeared in Appl. Phys. Lett. 104, 072410 (2014) and may be found at https://doi.org/10.1063/1.4865415.