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@ARTICLE{Freimuth:850618,
author = {Freimuth, Frank},
title = {{T}ailor-made currents},
journal = {Nature materials},
volume = {17},
number = {6},
issn = {1476-4660},
address = {Basingstoke},
publisher = {Nature Publishing Group},
reportid = {FZJ-2018-04426},
pages = {478 - 479},
year = {2018},
abstract = {The magnetization direction of nanosize magnets is used
nowadays to store information compactly in hard disks. The
magnetization points either up or down, which corresponds to
the values 0 and 1 of the bit. In order to reduce the size
of magnetic bits further and to increase the information
density in magnetic storage devices, the mechanism used to
write the bits by switching the magnetization up or down
needs to be efficient and reliable at smaller length scales.
The spin-transfer torque is such a scalable mechanism: when
a spin current traverses a magnet, the spins exert a torque
on the magnetization if they are not aligned with it. It can
therefore be used to switch the magnetization in magnetic
bilayers composed of a normal metal layer and a magnetic
layer (Fig. 1a). Spin currents flowing from the normal metal
into the magnet can be generated through electric currents
applied parallel to the bilayer interface1,2. In magnetic
bilayers, however, such current-induced torques on the
magnetization are not possible without spin–orbit
interaction and are therefore called spin–orbit torques.
Now, writing in Nature Materials, Baek and colleagues3
demonstrate an unexpected spin polarization of the spin
currents in trilayers composed of two magnets sandwiching a
normal metal layer (Fig. 1b) and show that the bottom magnet
can be used for the switching of the top magnet without an
additional external magnetic field.},
cin = {IAS-1 / PGI-1 / JARA-FIT / JARA-HPC},
ddc = {610},
cid = {I:(DE-Juel1)IAS-1-20090406 / I:(DE-Juel1)PGI-1-20110106 /
$I:(DE-82)080009_20140620$ / $I:(DE-82)080012_20140620$},
pnm = {142 - Controlling Spin-Based Phenomena (POF3-142)},
pid = {G:(DE-HGF)POF3-142},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:29795218},
UT = {WOS:000432928300006},
doi = {10.1038/s41563-018-0086-5},
url = {https://juser.fz-juelich.de/record/850618},
}