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<div class="WordSection1"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif" lang="ES"><o:p></o:p></span>
<p class="MsoNormal"><span lang="ES"><o:p> </o:p></span></p>
<p><b><span lang="ES">Título: </span></b><span lang="ES">Indirect
Chiral Magnetic Exchange through
Dzyaloshinskii-Moriya–Enhanced RKKY Interactions<br>
<br>
<b>Ponente: </b> Prof. Matthias Bode (University of Würzburg)<br>
<br>
<b>Lugar: </b>Sala de Grados de la Facultad de Ciencias<b> <br>
<br>
Fecha y hora: </b>martes 11 de febrero a las 12:30 <br>
<br>
<b>Resumen de la charla:</b> </span><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US"
lang="ES">Localized electron spins can couple magnetically via
the Ruderman-Kittel-Kasuya-Yosida interaction even if their
wave functions lack direct overlap. </span><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US">Theory
predicts that spin-orbit scattering leads to a
Dzyaloshinskii-Moriya type enhancement of this indirect
exchange interaction, giving rise to chiral exchange terms.
Recently, we performed a spin-polarized scanning tunneling
microscopy study of transition metal oxide chains on the (001)
surfaces of Ir and Pt. Our STM results confirm that the
deposition of Co, Fe, Mn, and Cr on the (2×1)
oxygen-reconstructed Ir(001) surface leads to the formation of
quasi-one-dimensional chains with a (3×1) unit cell. In
contrast, preparation on Pt(001) required deposition onto the
cold substrate with subsequent annealing in an oxygen
atmosphere. In particular, for MnO<sub>2</sub> chains we
observed highly complex spin structures. Whereas we find an
almost antiferromagnetic Mn–Mn coupling along the chains, the
inter-chain coupling across the non-magnetic substrates turns
out to be chiral. These magnetic structures observed for MnO<sub>2</sub>
can be viewed as highly anisotropic Skyrmions.</span><o:p></o:p></p>
<p class="MsoNormal"><br>
<br>
<b>Resumen CV: </b><i>Prof. Matthias Bode holds the Chair of
Experimental Physics II department at the University of
Würzburg since 2010. After getting his PhD in Physics, he led
between 1997 and 2006 the ‘Nanomagnetism’ research sub-group
in the University of Hamburg, where he contributed decisively
to the development of spin resolved imaging techniques with
atomic resolution. His studies paved the way to understand
exotic magnetic ground states in low dimensional systems. He
has recieved the Philip-Morris Research Award and is
Distinguished Lecturer of the IEEE Magnetic Society. His
current research interests are topological, magnetic and
transport properties of surfaces investigated by Scanning
Tunnelling Microscopy. </i><o:p></o:p></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB"
lang="ES"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB"><img
id="Imagen_x0020_1"
src="cid:part1.792BC070.F86291B8@unizar.es"
alt="Departamento de Física de la Materia Condesada"
class="" width="550" height="160"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Adobe Garamond
Pro",serif;mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Adobe Garamond
Pro",serif;mso-fareast-language:EN-GB" lang="ES">Facultad
de Ciencias, C/ Pedro Cerbuna 12, 50009 Zaragoza (SPAIN)<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Adobe Garamond
Pro",serif;mso-fareast-language:EN-GB">Web: <a
href="https://fmc.unizar.es/" moz-do-not-send="true">https://fmc.unizar.es/</a><o:p></o:p></span></p>
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