Dimensionality cross-over in magnetism: from domain walls (2D) to vortices (1D)

Aurélien Masseboeuf (1) , Olivier Fruchart (2) , Jean-Christophe Toussaint (2) , Fabien Cheynis (3, 4) , Pascale Bayle-Guillemaud (1) , A. Marty (1)

1 INAC - Institut Nanosciences et Cryogénie
2 NEEL - MNM - Micro et NanoMagnétisme
3 NEEL - Institut Néel
4 CINaM - Centre Interdisciplinaire de Nanoscience de Marseille

Dimensionality cross-over is a classical topic in physics. Surprisingly it has not been searched in micromagnetism, which deals with objects such as domain walls (2D) and vortices (1D). We predict by simulation a second-order transition between these two objects, with the wall length as the Landau parameter. This was confirmed experimentally based on micron-sized self-assembled Co(111) dots.

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Aurélien Masseboeuf, Olivier Fruchart, Jean-Christophe Toussaint, Fabien Cheynis, Pascale Bayle-Guillemaud, et al.. Dimensionality cross-over in magnetism: from domain walls (2D) to vortices (1D). 2009. ⟨hal-00416725v1⟩