Parts | Days | Selection | Search | Updates | Downloads | Help
MA: Fachverband Magnetismus
MA 48: Poster Session II
MA 48.47: Poster
Thursday, March 10, 2016, 15:00–18:00, Poster B1
Non-local magnetoresistance in YIG/Pt nanostructures — •Tobias Wimmer1,2, Sebastian Goennenwein1,2,3, Kathrin Ganzhorn1,2, Richard Schlitz1,2, Matthias Pernpeintner1,2,3, Matthias Althammer1, Rudolf Gross1,2,3, and Hans Huebl1,2,3 — 1Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany — 2Physik-Department, Technische Universität München, 85748 Garching, Germany — 3Nanosystems Initiative Munich (NIM), Schellingstraße 4, 80799 München Germany
The spin Hall magnetoresistance (SMR) in ferrimagnetic insulator/normal metal heterostructures has been extensively studied in Yttrium Iron Garnet /Platinum (YIG/Pt) bilayer structures. Recently, a non-local analogue of the SMR has been discovered in YIG/Pt nanostructures with two parallel Pt strips separated by a few 100 nm. Owing to the spin Hall effect, a charge current flowing along one Pt strip will generate a transverse spin current. The latter can create or annihilate magnons in the ferrimagnet, depending on magnetization orientation. As a result, an electrically generated non-equilibrium magnon population diffuses within the ferrimagnet, generating a non-local voltage drop across the second Pt strip. We investigate the evolution of this non-local magnon mediated magnetoresistance with temperature, magnetic field strength and field orientation. Our results show that the mechanisms behind the spin Hall and the non-local magnetoresistance are qualitatively different.