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<p>Dear colleagues,</p>
<p>It is my pleasure to invite you to Seminar of Institute of
Physics of Charles University, entitled:</p>
<p><b>Spin currents and spin-torques in antiferromagnets</b></p>
<p>Speaker: <a moz-do-not-send="true"
href="https://www.fzu.cz/lide/ing-jakub-zelezny-phd">Ing. Jakub
Železný, Ph.D.</a><br>
<br>
Time: Tuesday 26.10.2021 from 14:00<br>
<br>
Place: Seminar room of Institute of Physics F285 (atelier) ,
second floor, Ke Karlovu 5, Prague</p>
<p><i>Abstract:</i><i><br>
</i></p>
<p><i>Conventional microelectronics based on semiconductors has been
hugely successful, but it is reaching its physical limits. This
accelerates the search for alternative technologies that could
replace it. One such alternative is based on utilizing the spin
of the electron in addition to its charge: a field known as
spintronics. So far, spintronics has been mainly utilized in
memories, but possible applications in processors or
neuromorphic computing are also explored. Spintronics is
typically based on ferromagnetic materials, but recently
antiferromagnetic materials (materials that have a long-range
magnetic order, but no net magnetic moment) have attracted
attention since they have various possible advantages for
spintronics such as a fast switching speed.</i></p>
<p><i>Here we review recent progress in the understanding of how
antiferromagnets can be utilized for spintronics. Although in
simple antiferromagnets many of the key spintronics phenomena
vanish, we show that in low symmetry or non-collinear
antiferromagnets, most of the effects that exist in
ferromagnets, are also present. For example, we have shown that
in some antiferromagnets, electrical current is spin-polarized
or that they can generate pure spin currents. We also
demonstrate that these spin currents can generate a spin-torque,
which can be used to control the orientation of the
antiferromagnetic order, analogously to ferromagnetic materials.</i></p>
<p>With my best regards</p>
Jaroslav Hamrle
<pre class="moz-signature" cols="72">--
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Mgr. Jaroslav Hamrle, Ph.D.
Institute of Physics, room F232
Faculty of Mathematics and Physics
Charles University
Ke Karlovu 5
121 16 Prague
Czech Republic
tel: +420-95155 1340
email: <a class="moz-txt-link-abbreviated" href="mailto:hamrle@karlov.mff.cuni.cz">hamrle@karlov.mff.cuni.cz</a>
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