<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=iso-8859-2"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:DengXian;
panose-1:2 1 6 0 3 1 1 1 1 1;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:"\@DengXian";
panose-1:2 1 6 0 3 1 1 1 1 1;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman",serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri",sans-serif;
color:windowtext;}
p.Default, li.Default, div.Default
{mso-style-name:Default;
margin:0cm;
margin-bottom:.0001pt;
text-autospace:none;
font-size:12.0pt;
font-family:"Arial",sans-serif;
color:black;
mso-fareast-language:ZH-CN;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 70.85pt 70.85pt 70.85pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=SL link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Vabimo vas na 5. predavanje iz sklopa "Kolokviji na IJS" v letu 2018/19, ki bo <strong><span style='color:red'>v sredo, 19. decembra 2018, ob 13. uri </span></strong><span style='color:red'>v Veliki predavalnici Instituta »Jožef Stefan«</span> na Jamovi cesti 39 v Ljubljani. Napovednik predavanja najdete tudi na naslovu <a href="http://www.ijs.si/ijsw/Koledar_prireditev">http://www.ijs.si/ijsw/Koledar_prireditev</a>, posnetke preteklih predavanj<span style='color:blue'> </span>pa na <a href="http://videolectures.net/kolokviji_ijs">http://videolectures.net/kolokviji_ijs</a>. <o:p></o:p></p><p class=MsoNormal>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br><br><strong><span style='color:red'><o:p></o:p></span></strong></p><p class=MsoNormal><b><span lang=EN-US>prof. dr. Stéphane Mangin</span></b><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><i><span lang=EN-US>Institut Jean Lamour, UMR CNRS 7198 – Université de Lorraine, Nancy, Francija<o:p></o:p></span></i></p><p class=MsoNormal><i><span lang=EN-US><o:p> </o:p></span></i></p><p class=MsoNormal align=center style='mso-margin-top-alt:auto;margin-bottom:12.0pt;text-align:center'><b><span style='font-size:14.0pt'>Materiali za magnetno zapisovanje s svetlobo<o:p></o:p></span></b></p><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt;text-align:justify'>V preteklih petnajstih letih se z možnostjo manipulacije magnetizacije brez zunanjega magnetnega polja ukvarja vse več raziskovalcev. Od odkritja preklopa zaradi navora spinskega toka [1], učinka električnih polj na magnetne naprave [2] in preklopa magnetizacije s femto- in pikosekundnimi sunkovnimi laserji [3-5] je postala manipulacija magnetizacije na ultrakratkih časih fundamentalen izziv z implikacijami za magnetno shranjevanje podatkov. Tu bomo predstavili optično manipulacije magnetizacije skrbno pripravljenih materialov in naprav. Pokazali bomo, da je mogoče doseči preklop magnetizacije s polarizirano svetlobo tako v zelo posebnih zlitinah redkih zemelj in prehodnih kovin [3,4] kot v vrsti materialov, kot so zlitine ter večplastne in kompleksne strukture [5]. Posebej se bomo dotaknili optičnega preklopa magnetizacije v feromagnetni tanki plasti in v granularnih snoveh. Prav ti materiali predstavljajo preboj na področju uporabe, saj so kompatibilni s spintronskimi elementi za shranjevanje podatkov, spomin in logiko. Nadalje bomo pokazali, da je mogoče ustvariti femtosekundni sunek elektronov, ki prav tako pripelje do preklopa magnetizacije [6,7]. Ta raziskava nadalje nudi pogled v fundamentalne mehanizme, ki vodijo proces. <o:p></o:p></p><p class=MsoNormal style='text-align:justify'>[1] J. Katine et al., Phys. Rev. Lett. <b>84</b>, 3149 (2000).<o:p></o:p></p><p class=MsoNormal style='text-align:justify'>[2] H. Ohno et al., Nature <b>408</b>, 944 (2000). <o:p></o:p></p><p class=MsoNormal style='text-align:justify'>[3] C. D. Stanciu et al., Phys. Rev. Lett. <b>99</b>, 047601 (2007).<o:p></o:p></p><p class=MsoNormal style='text-align:justify'>[4] S. Mangin et al., Nat. Mater. <b>13</b>, 286 (2014). <o:p></o:p></p><p class=MsoNormal style='text-align:justify'>[5] C.-H. Lambert et al., Science <b>345</b>, 1337 (2014).<o:p></o:p></p><p class=MsoNormal style='text-align:justify'>[6] Y. Xu et al., Adv. Mater. <b>29</b>, 42 1703474 (2017).<o:p></o:p></p><p class=MsoNormal style='text-align:justify'>[7] S. Iihama et al., Adv. Mater. 1804004 (2018).<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt;text-align:justify'>Predavanje bo v angleščini.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt'><strong><span style='color:red'>Lepo vabljeni!<o:p></o:p></span></strong></p><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt;margin-left:212.4pt;text-indent:35.4pt'><span style='color:black'>*****</span><o:p></o:p></p><span style='font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:SL'><br clear=all style='page-break-before:always'></span><p class=MsoNormal><span style='color:black'>We invite you to the 5th Institute colloquium in the academic year 2018/19. The colloquium will be held </span><b><span style='color:red'>on Wednesday December 19, 2018 at 1 PM</span></b><span style='color:red'> in <b>the main Institute lecture hall</b></span><span style='color:black'>, Jamova 39, Ljubljana. To read the abstract click </span><span style='color:#1F497D'><a href="http://www.ijs.si/ijsw/Koledar_prireditev">http://www.ijs.si/ijsw/Koledar_prireditev</a>. </span><span style='color:black'>Past colloquia are posted<o:p></o:p></span></p><p class=MsoNormal><span style='color:black'>on</span><span style='color:#1F497D'> <a href="http://videolectures.net/kolokviji_ijs">http://videolectures.net/kolokviji_ijs</a>.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal style='margin-bottom:12.0pt'>********************************************<b><o:p></o:p></b></p><p class=MsoNormal><b><span lang=EN-US>Professor Stéphane Mangin<o:p></o:p></span></b></p><p class=MsoNormal><i><span lang=EN-US>Institut Jean Lamour, UMR CNRS 7198 – Université de Lorraine, Nancy, France<o:p></o:p></span></i></p><p class=MsoNormal><i><span lang=EN-US><o:p> </o:p></span></i></p><p class=Default align=center style='text-align:center'><b><span style='font-size:14.0pt;font-family:"Times New Roman",serif;color:#202020;mso-fareast-language:SL'>Engineering materials for all optical magnetic recording<o:p></o:p></span></b></p><p class=Default><span lang=EN-US style='font-family:"Times New Roman",serif'><o:p> </o:p></span></p><p class=MsoNormal style='text-align:justify'>The possibilities of manipulating magnetization without any applied magnetic field have attracted the growing attention of researchers during the last fifteen years. From the discovery of spin transfer torque switching [1], the effect of electric fields on magnetic devices [2] to magnetization switching using femto- or picosecond pulsed lasers [3-5] the manipulation of magnetization at ultra-short time scales has become a fundamentally challenging topic with implications for magnetic data storage. Here we demonstrate optical manipulation of the magnetization of carefully engineered magnetic materials and devices. We prove that polarized light induced magnetization reversal can be observed not only in very particular rare-earth transition-metal alloys [3,4] but also in a variety of materials (alloys, multilayers and complex structures) [5]. In particular we show optical magnetization reversal for ferromagnetic thin film and granular media. This is a breakthrough for application since it provides materials “compatible” with spintronic applications for data storage, memories and logic. Furthermore we show that it is possible to create femtosecond electron pulse which also induces magnetisation reversal [6,7]. In addition this study offers valuables information to understand the underlying fundamental mechanisms involved.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>[1] J. Katine et al., Phys. Rev. Lett. <b>84</b>, 3149 (2000).<o:p></o:p></p><p class=MsoNormal>[2] H. Ohno et al., Nature <b>408</b>, 944 (2000). <o:p></o:p></p><p class=MsoNormal>[3] C. D. Stanciu et al., Phys. Rev. Lett.<b> 99</b>, 047601 (2007).<o:p></o:p></p><p class=MsoNormal>[4] S. Mangin et al., Nat. Mater. <b>13</b>, 286 (2014). <o:p></o:p></p><p class=MsoNormal>[5] C.-H. Lambert et al., Science <b>345</b>, 1337 (2014).<o:p></o:p></p><p class=MsoNormal>[6] Y. Xu et al., Adv. Mater. <b>29</b>, 42 1703474 (2017).<o:p></o:p></p><p class=MsoNormal>[7] S. Iihama et al., Adv. Mater. 1804004 (2018).<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Cordially invited!<o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p></div></body></html>