Aug 28 – 31, 2018
EPFL
Europe/Zurich timezone

【812】 Velocity enhancement by synchronization of magnetic domain walls

Aug 30, 2018, 2:30 PM
15m
CE 1 (EPFL)

CE 1

EPFL

Talk Magnetism and Spintronics at the Nanoscale Magnetism and Spintronics at the Nanoscale

Speaker

Dr Ales Hrabec (Laboratoire de Physique des Solides, Université Paris-Sud, Orsay, France)

Description

In this work, we study how oscillator synchronization can be used to optimize the domain wall (DW) dynamics in magnetic bilayers with perpendicular anisotropy. We show that dipolarly coupled DWs reach larger velocities as compared to isolated walls when the two chiral walls form a magnetic flux closing object. While this situation is easily maintained in a stationary motion regime, the observation of large velocities in the precessional regime imply that the DWs internal oscillations are synchronized, even when their natural frequencies are different. Using an additional in-plane magnetic field, the system can be tuned and synchronization is observed over a finite range of detuning. Using simulations, a rich variety of states is described, from perfect synchronization to complete separation.

Primary authors

Dr Ales Hrabec (Laboratoire de Physique des Solides, Université Paris-Sud, Orsay, France) Mrs Viola Krizakova (Institut Néel, CNRS, Grenoble, France) Dr Stefania Pizzini (Institut Néel, CNRS, Grenoble, France) Dr Joao Sampaio (Laboratoire de Physique des Solides, Université Paris-Sud, Orsay, France) Dr Andre Thiaville (Laboratoire de Physique des Solides, Université Paris-Sud, Orsay, France) Dr Stanislas Rohart (Laboratoire de Physique des Solides, Université Paris-Sud, Orsay, France) Dr Jan Vogel (Institut Néel, CNRS, Grenoble, France)

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