Dresden 2014 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 60: Focus Session: Chiral Domain Walls in Ultrathin Films (organized by MA)
TT 60.3: Topical Talk
Mittwoch, 2. April 2014, 10:45–11:15, BEY 118
'Dzyaloshinskii domain walls' in ultrathin magnetic films — •André Thiaville1, Stanislas Rohart1, Emilie Jué2, Olivier Boulle2, Vincent Cros3, Albert Fert3, Stefania Pizzini4, and Jan Vogel4 — 1Lab. Phys. Solides, CNRS, Univ. Paris-Sud, 91405 Orsay, France — 2SPINTEC, INAC, CEA-CNRS-UJF-INPG, 38054 Grenoble, France — 3UMP CNRS-Thales & Univ. Paris-Sud, 91767 Palaiseau, France — 4Institut Néel, CNRS-UJF, 38042 Grenoble, France
In ultrathin magnetic films with perpendicular anisotropy and vertical structural inversion asymmetry, we have recently proposed [1] that the domain walls are chiral Néel walls with a peculiar dynamics. This results from a Dzyaloshinskii-Moriya interaction (DMI) of the interfacial type, predicted by A. Fert long ago and observed on monolayers by SP-STM [2]. Several recent experimental observations of the dynamics of domain walls in such samples, under fields and current, are in agreement with this picture, with the effect of current incorporated by the spin Hall effect in an adjacent layer [3].
After recalling the main characteristics of these Dzyaloshinskii domain walls, I will describe additional features that occur at large values of the DMI (but still in the region where an isolated domain is stable), namely the tilt of such walls in nanostrip-shaped samples. This affects the statics and dynamics of these walls [4].
[1] A. Thiaville et al., EPL 100, 57002 (2012) [2] P. Ferriani et al., PRL 101, 027201 (2008) [3] S. Emori, et al., Nature Mater. 12, 611 (2013) [4] O. Boulle et al., PRL 111, 217203 (2013)