Skyrmions in PdFe bilayers

Formation of magnetic skyrmions with tunable properties in PdFe bilayer deposited on Ir(111)
E. Simon, K. Palotas, L. Rozsa, L. Udvardi, and L. Szunyogh

Phys. Rev. B 90, 094410 (2014)

Magnitudes of the Fe-Fe DM vectors for PdFe/Ir(111) as a function of the interatomic distance measured in units of the in-plane lattice constant (a2D) for different Fe layer relaxations. The inset shows a sketch of the in-plane components of the calculated DM vectors between a central Fe atom (C) and its nearest and next nearest Fe neighbors at −5% relaxation

Spin flop in AF

Successive spin-flop transitions of a Neel-type antiferromagnet Li2MnO3 single crystal with a honeycomb lattice.
K. Balamurugan,1,2 Sang-Hyun Lee,1,3 Jun-Sung Kim,4 Jong-Mok Ok,4 Youn-Jung Jo,5 Young-Mi Song,6 Shin-Ae Kim, E. S. Choi,8 Manh Duc Le,1,2 and Je-Geun Park

Phys. Rev. B 90, 104412 (2014)

Imaging spin waves

Close-up on spin dynamics.

Stanislas Rohart and Guillemin Rodary

Nature Materials 13, 770 (2014) 

Imaging of spin waves in atomically designed nanomagnets.

A. Spinelli, B. Bryant, F. Delgado, J. Fernández-Rossier and A. F. Otte

Nature Materials 13, 782 (2014)

a, Schematic view of spin-wave excitation on a six-atom chain using scanning tunnelling microscopy. The highest efficiency is obtained when the tip is placed at an edge atom. b, Principle of spin-wave-assisted magnetization reversal in the chain. The switching, due to thermal and/or quantum fluctuations, is much faster when the scanning tunnelling microscope (STM) excites the chain in a spin-wave (SW) state.

Frustration in artificial spin ice

The unhappy wanderer.
R. L. Stamps
Nature Physics 10, 623 (2014)

Emergent ice rule and magnetic charge screening from vertex frustration in artificial spin ice.

Ian Gilbert, Gia-Wei Chern, Sheng Zhang, Liam O’Brien, Bryce Fore,, Cristiano Nisoli and Peter Schi effer

Nature Physics 10, 670 (2014)

An initial spin (green) is placed arbitrarily on an empty lattice. A second spin is placed on a neighbouring lattice segment in a direction parallel to the first, unless the spins share a vertex, in which case the direction of the spin reverses (if the vertex is traversed in a straight line) or rotates (if a turn is taken). Subsequent spins placed in the same way eventually reach the starting position and close the loop (red). A lattice is considered 'happy' (a) when these rules can be obeyed at every segment along the loop, and 'unhappy' or vertex-frustrated (b) when they fail.

Spin Hall Effect is electric

SHE’s electric.
Kyoung-Whan Kim and Hyun-Woo Lee
Nature Physics 10, 549 (2014)

Spin Hall effect tunnelling spectroscopy.
Luqiao Liu, Ching-Tzu Chen , J. Z. Sun
Nature Physics 10, 561 (2014)

a, The spin–orbit interaction gives rise to an illusory magnetic field aligned parallel to the spin direction of flowing electrons (thick grey arrow). The red (blue) arrow outside the material denotes the magnetic field for spin-up (spi…