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

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.
Authors:
 [1] ;  [2] ; ; ; ;  [1] ;  [1] ;  [3] ;  [4] ;  [1] ;  [5] ;  [6] ;  [7] ;
  1. Institut für Physik, Johannes Gutenberg-Universität, Staudingerweg 7, 55128 Mainz (Germany)
  2. (Spain)
  3. (Switzerland)
  4. Fachbereich Physik, Universität Konstanz, Universitätsstraße 10, 78457 Konstanz (Germany)
  5. (Germany)
  6. Institut für Optik und Atomare Physik, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin (Germany)
  7. GREYC, UMR 6072, CNRS-ENSICAEN-UCBN, 6 Boulevard du Maréchal Juin, Caen Cedex 14050 (France)
Publication Date:
OSTI Identifier:
22283127
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 7; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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