Efficient spin transfer torque in La{sub 2/3}Sr{sub 1/3}MnO{sub 3} nanostructures

Journal Article · Mon Feb 17 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4865415· OSTI ID:22283127

Foerster, Michael ^[1]; Peña, Luis; Finizio, Simone; Schulz, Tomek; Bisig, André ^[1]; Vaz, C. A. F. ^[1]; Heinen, Jan ^[2]; Büttner, Felix ^[1]; Eisebitt, Stefan ^[3]; Méchin, Laurence ^[4]; others, and

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1. Institut für Physik, Johannes Gutenberg-Universität, Staudingerweg 7, 55128 Mainz (Germany)
2. Fachbereich Physik, Universität Konstanz, Universitätsstraße 10, 78457 Konstanz (Germany)
3. Institut für Optik und Atomare Physik, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin (Germany)
4. GREYC, UMR 6072, CNRS-ENSICAEN-UCBN, 6 Boulevard du Maréchal Juin, Caen Cedex 14050 (France)

We carry out low temperature magnetotransport measurements on nanostructured La{sub 2/3}Sr{sub 1/3}MnO{sub 3} 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{sup −14} Tm{sup 2}/A, which is significantly higher than in permalloy.

• OSTI ID: 22283127
• Journal Information: Applied Physics Letters, Vol. 104, Issue 7; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
77 NANOSCIENCE AND NANOTECHNOLOGY
COMPARATIVE EVALUATIONS
DOMAIN STRUCTURE
EFFICIENCY
ELECTRIC CURRENTS
LANTHANUM COMPOUNDS
MAGNETIZATION
MAGNETORESISTANCE
MANGANATES
NANOSTRUCTURES
PERMALLOY
SPIN
SPIN ORIENTATION
STRONTIUM COMPOUNDS
TORQUE