Regensburg 2019 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 53: Magnetic Heuslers, half-metals and oxides
MA 53.10: Vortrag
Freitag, 5. April 2019, 12:00–12:15, H33
Spin-pumping in STO/LSMO/LNO/SRO heterostructures — •Christoph Hauser1, Camillo Ballani1, Frank Heyroth2, and Georg Schmidt1,2 — 1Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz 3, 06120 Halle, Germany — 2Interdisziplinäres Zentrum für Materialwissenschaften, Heinrich-Damerow-Str. 4, 06120 Halle(Saale), Germany
We have investigated spin pumping and the inverse spin-Hall effect in heterostructures based on La0.7Sr0.3MnO3(LSMO), LaNiO3(LNO), and SrRuO3 (SRO). The layers are deposited by pulsed laser deposition. Structural characterization is done by X-ray diffraction and transmission electron microscopy (TEM). The magnetic properties are determined by SQUID magnetometry, and ferromagnetic resonance at a temperature of 190 K. Spin pumping and inverse spin-Hall effect are measured below the Curie temperature of the LSMO but above the one of SRO. For LSMO/LNO/Pt multilayers increased damping in FMR is detected [1], however no ISHE can be measured. For LSMO/LNO a weak ISHE is visible, however the signal cannot be unambiguously identified because of thermo voltages. In the LSMO/LNO/SRO heterostructure a clear ISHE can be measured, which can be separated from side effects stemming from anisotropic magnetoresistance (AMR) and spin rectification [2].
[1] Y. Tserkovnyak et al., Phys. Rev. B, 66, 224403 (2002)
[2] A. Azevedo et al., Phys. Rev. B, 83, 144402 (2011)