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MA: Fachverband Magnetismus

MA 17: Spin Dynamics / Spin Torque II

MA 17.14: Vortrag

Mittwoch, 24. März 2010, 18:00–18:15, H10

The Barnett effect in magnetic nanostructures — •Stefan Bretzel¹, Gerrit E. W. Bauer¹, Arne Brataas², and Yaroslav Tserkovnyak³ — ¹Kavli Institute of NanoScience, TU Delft, Lorentzweg 1, 2628CJ Delft, The Netherlands — ²Department of Physics, Norwegian University for Science and Technology, 7491 Trondheim, Norway — ³Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA

The Barnett effect – magnetization induced by mechanical rotation – was discovered at the dawn of quantum mechanics and provided first evidence of the anomalous electron g-factor. We discuss the Barnett effect in the framework of the Landau-Lifshitz-Gilbert equation for magnetic nanostructures, providing theoretical estimates for its observation in different structures and materials. Furthermore, we propose a magnetomechanical device consisting of a sliding domain wall in a rotatable magnetic wire, which relates the Barnett effect with its close relative, the Einstein-de Haas effect via Onsager’s reciprocity relations.