Magnonics and spin-orbitronics - institut de physique et de chimie

Mini-symposium Labex NIE
Nanostructures in Interaction with their Environment
Thursday, December 15th, 2016, 15h00
IPCMS Auditorium
Magnonics and spin-orbitronics
15h-15h45
R. L. Stamps (University of Glasgow, UK)
Spin waves in topologically complex magnetic configurations
Chirality in spin systems, associated with the appearance of skyrmionic and helicoidal
textures for example, [1] also affects spin wave excitations. I will discuss how spin wave
propagation can be strongly affected by chiral interactions. In one example I will discuss
nonreciprocity, channeling and scattering from magnetic domain walls.[2] In another example
I will show how chirality can affect focusing of spin waves in thin ferromagnetic films.
[1] Y. Togawa et al., Physical Review B 92 p. 220412 (2015).
[2] F. Garcia-Sanchez et al., Physical Review Letters 114, 247206 (2015).
[3] Joo-Von Kim et al., Physical Review Letters 117, 197204 (2016).
15h45-16h
Coffee break
16h-16h45
Abdelmadjid Anane (Unité Mixte de Physique, CNRS, Thales, Palaiseau)
Magnonic nanostructures based on ultra-thin YIG films
In recent years, Spin Orbit interaction as a source of spin current has been widely used
through the physics of Spin Hall Effect (SHE) or that of Rashba effect. The peculiar
symmetry of SHE allows creating a spin accumulation at the interface between a spin-orbit
metal and a magnetic insulator that could lead to a net pure spin current flowing from the
metal into the insulator [1]. This spin current will induce a torque on the magnetization and
eventually could drive it into steady motion. Thanks to the advent of high quality ultra-thin
Y3Fe5O12 (YIG) [2], it is now possible to envision active magnonic devices where YIG
nanostructures can be addressed using pure spin currents. The talk will address some of the
recent progress in the field of magnon-spintronics.
[1] Y. Kajiwara, et al., Nature 464(7286), 262 (2010).
[3] O. d’Allivy Kelly et al., Applied Physics Letters, 103, 082408 (2013).
[2] M. Collet et al., Nature Comm.7, 10377 (2016).
Contact: Matthieu Bailleul ([email protected])
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