In the experiment researchers discovered an unexpected effect: when magnetization directions in two
ferromagnetic layers were not parallel, the interaction between these layers and superconductive layer produced induced magnetization in the gold layer, «overjumping» the superconductor.
The sign and magnitude of the heat - driven spin current can be controlled by the composition of
a ferromagnetic layer and thickness of a heat sink layer.»
This current of heat creates a separation of electron spins that then diffuse through the Cu heat sink and affect the magnetization of a second
ferromagnetic layer, CoFeB, causing the magnetization to tilt and then precess.
The thermal excitation in
the ferromagnetic layer produces spin current in the adjacent nonmagnetic layer in a picosecond timescale.
First the team investigated how angle θ between
ferromagnetic layer magnetizations depends on angle φ between the axes of the antiferromagnets (fig. 1a, top).
Not exact matches
The spin - valve consisted of two
ferromagnetic cobalt
layers, one superconductive niobium
layer with thickness of approximately 150 atoms and a
layer of gold.
The «wormhole» in this experiment is a sphere made of different
layers: an external
layer with a
ferromagnetic surface, a second inner
layer, made of superconducting material, and a
ferromagnetic sheet rolled into a cylinder that crosses the sphere from one end to the other.
A team of Argonne researchers led by materials scientist Anand Bhattacharya examined the relationship at interfaces between
layers of nonmagnetic nickel - based nickelate material and a
ferromagnetic manganese - based manganite.