Ultrafast spintronics roadmap: from femtosecond spin current pulses to terahertz non-uniform spin dynamics via nano-confined spin transfer torques (Conference Presentation)

2016 ◽  
Author(s):  
Alexey Melnikov ◽  
Ilya Razdolski ◽  
Alexandr Alekhin ◽  
Nikita Ilin ◽  
Jan Meyburg ◽  
...  
Keyword(s):  
Spin Dynamics ◽  
Spin Current ◽  
Spin Transfer ◽  
Current Pulses

scholarly journals Spin transport and spin dynamics in antiferromagnets

2021 ◽  
Author(s):  
◽  
Geert Hoogeboom
Keyword(s):  
Magnetic Field ◽  
Heavy Metal ◽  
Spin Transport ◽  
Spin Dynamics ◽  
Magnetic Moments ◽  
Spin Current ◽  
Active Role ◽  
Metal Films ◽  
Alternating Direction ◽  
High Processing

Ferromagnets (FMs) have been a key ingredient in information technology because it is easy to manipulate and read out the magnetization. Antiferromagnets (AFMs) have magnetic moments with alternating direction resulting in negligible magnetization. This gives them high processing and device downscaling features, but this also makes it challenging to manipulate and interact with the AFM order. This thesis studies this interaction with antiferromagnets. NiO AFM order has been read out by electrically injecting spin current via the spin Hall effect in thin heavy metal films. In DyFeO3, both Dy and Fe magnetic moments, their excitation and interaction have been probed. A magnetic field lifts the degeneracy of magnetic excitations with opposite magnon spin, allowing a spin current to be detected nonlocally. The AFM order and the generation of spin current can easily be controlled by an adjacent FM. Thereby, we show that AFMs have the potential to play an active role in spintronics.

scholarly journals Ultrafast optically induced spin transfer in ferromagnetic alloys

2020 ◽  
Vol 6 (3) ◽  
pp. eaay8717 ◽  
Author(s):  
M. Hofherr ◽  
S. Häuser ◽  
J. K. Dewhurst ◽  
P. Tengdin ◽  
S. Sakshath ◽  
...  
Keyword(s):  
Density Functional ◽  
Spin Dynamics ◽  
Research Area ◽  
Spin Transfer ◽  
Optical Manipulation ◽  
Functional Theory ◽  
Control Schemes ◽  
All Optical ◽  
Spin Excitations ◽  
Experimental Findings

The vision of using light to manipulate electronic and spin excitations in materials on their fundamental time and length scales requires new approaches in experiment and theory to observe and understand these excitations. The ultimate speed limit for all-optical manipulation requires control schemes for which the electronic or magnetic subsystems of the materials are coherently manipulated on the time scale of the laser excitation pulse. In our work, we provide experimental evidence of such a direct, ultrafast, and coherent spin transfer between two magnetic subsystems of an alloy of Fe and Ni. Our experimental findings are fully supported by time-dependent density functional theory simulations and, hence, suggest the possibility of coherently controlling spin dynamics on subfemtosecond time scales, i.e., the birth of the research area of attomagnetism.

scholarly journals X-ray detection of ultrashort spin current pulses in synthetic antiferromagnets

2020 ◽  
Vol 127 (22) ◽  
pp. 223902
Author(s):  
C. Stamm ◽  
C. Murer ◽  
M. S. Wörnle ◽  
Y. Acremann ◽  
R. Gort ◽  
...  
Keyword(s):  
Spin Current ◽  
X Ray ◽  
Current Pulses

scholarly journals Femtosecond Spin Current Pulses Generated by the Nonthermal Spin-Dependent Seebeck Effect and Interacting with Ferromagnets in Spin Valves

2017 ◽  
Vol 119 (1) ◽  
Author(s):  
Alexandr Alekhin ◽  
Ilya Razdolski ◽  
Nikita Ilin ◽  
Jan P. Meyburg ◽  
Detlef Diesing ◽  
...  
Keyword(s):  
Spin Current ◽  
Seebeck Effect ◽  
Spin Valves ◽  
Current Pulses

scholarly journals Resonant spin-transfer-driven switching of magnetic devices assisted by microwave current pulses

2008 ◽  
Vol 77 (21) ◽  
Author(s):  
Y.-T. Cui ◽  
J. C. Sankey ◽  
C. Wang ◽  
K. V. Thadani ◽  
Z.-P. Li ◽  
...  
Keyword(s):  
Spin Transfer ◽  
Magnetic Devices ◽  
Current Pulses

Domain-wall pinning, nonadiabatic spin-transfer torque, and spin-current polarization in permalloy wires doped with vanadium

2010 ◽  
Vol 81 (2) ◽  
Author(s):  
S. Lepadatu ◽  
J. S. Claydon ◽  
C. J. Kinane ◽  
T. R. Charlton ◽  
S. Langridge ◽  
...  
Keyword(s):  
Domain Wall ◽  
Spin Current ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Domain Wall Pinning
Sign in / Sign up

Export Citation Format

Share Document