<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:x="urn:schemas-microsoft-com:office:excel" 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=utf-8"><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:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
font-size:12.0pt;
font-family:"Times New Roman",serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
p.Default, li.Default, div.Default
{mso-style-name:Default;
margin:0cm;
text-autospace:none;
font-size:12.0pt;
font-family:"Arial",sans-serif;
color:black;
mso-fareast-language:ZH-CN;}
span.EmailStyle20
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@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" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><a name="_Hlk89782604"></a><a name="_Hlk41995074"></a><a name="_Hlk41470923"></a><a name="_Hlk20313133"></a><a name="_Hlk87964136"><span style='mso-bookmark:_Hlk20313133'><span style='mso-bookmark:_Hlk41470923'><span style='mso-bookmark:_Hlk41995074'><span style='mso-bookmark:_Hlk89782604'>Vabimo vas na 3. predavanje iz sklopa "Kolokviji na IJS" v letu 2022/23, ki bo <strong><span style='color:red'>v sredo, 16. novembra 2022, ob <u>13. uri</u> »v živo« </span></strong><span style='color:red'>v Veliki predavalnici Instituta »Jožef Stefan«</span> na Jamovi cesti 39 v Ljubljani, kjer bo tudi manjša pogostitev.<o:p></o:p></span></span></span></span></a></p><p class=MsoNormal><span style='mso-bookmark:_Hlk87964136'><span style='mso-bookmark:_Hlk20313133'><span style='mso-bookmark:_Hlk41470923'><span style='mso-bookmark:_Hlk41995074'><span style='mso-bookmark:_Hlk89782604'><strong><span style='font-size:11.0pt;mso-fareast-language:EN-US;font-weight:normal'><o:p> </o:p></span></strong></span></span></span></span></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk87964136'><span style='mso-bookmark:_Hlk20313133'><span style='mso-bookmark:_Hlk41470923'><span style='mso-bookmark:_Hlk41995074'><span style='mso-bookmark:_Hlk89782604'>Napovednik predavanja najdete tudi na naslovu </span></span></span></span></span><a href="http://www.ijs.si/ijsw/Koledar_prireditev"><span style='mso-bookmark:_Hlk87964136'><span style='mso-bookmark:_Hlk20313133'><span style='mso-bookmark:_Hlk41470923'><span style='mso-bookmark:_Hlk41995074'><span style='mso-bookmark:_Hlk89782604'>http://www.ijs.si/ijsw/Koledar_prireditev</span></span></span></span></span><span style='mso-bookmark:_Hlk87964136'><span style='mso-bookmark:_Hlk20313133'><span style='mso-bookmark:_Hlk41470923'><span style='mso-bookmark:_Hlk41995074'><span style='mso-bookmark:_Hlk89782604'></span></span></span></span></span></a><span style='mso-bookmark:_Hlk87964136'><span style='mso-bookmark:_Hlk20313133'><span style='mso-bookmark:_Hlk41470923'><span style='mso-bookmark:_Hlk41995074'><span style='mso-bookmark:_Hlk89782604'>, posnetke preteklih predavanj<span style='color:blue'> </span>pa na </span></span></span></span></span><a href="https://bit.ly/2YH8LYk"><span style='mso-bookmark:_Hlk87964136'><span style='mso-bookmark:_Hlk20313133'><span style='mso-bookmark:_Hlk41470923'><span style='mso-bookmark:_Hlk41995074'><span style='mso-bookmark:_Hlk89782604'>Arhiv TV IJS</span></span></span></span></span><span style='mso-bookmark:_Hlk87964136'><span style='mso-bookmark:_Hlk20313133'><span style='mso-bookmark:_Hlk41470923'><span style='mso-bookmark:_Hlk41995074'><span style='mso-bookmark:_Hlk89782604'></span></span></span></span></span></a><span style='mso-bookmark:_Hlk87964136'><span style='mso-bookmark:_Hlk20313133'><span style='mso-bookmark:_Hlk41470923'><span style='mso-bookmark:_Hlk41995074'><span style='mso-bookmark:_Hlk89782604'> in </span></span></span></span></span><a href="http://videolectures.net/kolokviji_ijs"><span style='mso-bookmark:_Hlk87964136'><span style='mso-bookmark:_Hlk20313133'><span style='mso-bookmark:_Hlk41470923'><span style='mso-bookmark:_Hlk41995074'><span style='mso-bookmark:_Hlk89782604'>http://videolectures.net/kolokviji_ijs</span></span></span></span></span><span style='mso-bookmark:_Hlk87964136'><span style='mso-bookmark:_Hlk20313133'><span style='mso-bookmark:_Hlk41470923'><span style='mso-bookmark:_Hlk41995074'><span style='mso-bookmark:_Hlk89782604'></span></span></span></span></span></a><span style='mso-bookmark:_Hlk87964136'><span style='mso-bookmark:_Hlk20313133'><span style='mso-bookmark:_Hlk41470923'><span style='mso-bookmark:_Hlk41995074'><span style='mso-bookmark:_Hlk89782604'>.<o:p></o:p></span></span></span></span></span></p><span style='mso-bookmark:_Hlk87964136'></span><p class=MsoNormal style='margin-bottom:12.0pt'><span style='mso-bookmark:_Hlk20313133'><span style='mso-bookmark:_Hlk41470923'><span style='mso-bookmark:_Hlk41995074'><span style='mso-bookmark:_Hlk89782604'>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<a name="_Hlk57188111"></a><a name="_Hlk57187882"></a><a name="_Hlk57031912"><span style='mso-bookmark:_Hlk57187882'><span style='mso-bookmark:_Hlk57188111'><b><o:p></o:p></b></span></span></a></span></span></span></span></p><span style='mso-bookmark:_Hlk57187882'></span><span style='mso-bookmark:_Hlk57031912'></span><p class=MsoNormal><span style='mso-bookmark:_Hlk20313133'><span style='mso-bookmark:_Hlk41470923'><span style='mso-bookmark:_Hlk41995074'><span style='mso-bookmark:_Hlk89782604'><span style='mso-bookmark:_Hlk57188111'><b>prof. dr. Tadej Rojac<o:p></o:p></b></span></span></span></span></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk20313133'><span style='mso-bookmark:_Hlk41470923'><span style='mso-bookmark:_Hlk41995074'><span style='mso-bookmark:_Hlk89782604'><span style='mso-bookmark:_Hlk57188111'><i>Institut »Jožef Stefan«<o:p></o:p></i></span></span></span></span></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk20313133'><span style='mso-bookmark:_Hlk41470923'><span style='mso-bookmark:_Hlk41995074'><span style='mso-bookmark:_Hlk89782604'><span style='mso-bookmark:_Hlk57188111'><i><o:p> </o:p></i></span></span></span></span></span></p><p class=MsoNormal style='text-align:justify'><span style='mso-bookmark:_Hlk20313133'><span style='mso-bookmark:_Hlk41470923'><span style='mso-bookmark:_Hlk41995074'><span style='mso-bookmark:_Hlk89782604'><span style='mso-bookmark:_Hlk57188111'><b><span style='font-size:14.0pt;color:#202020'>Dinamika domenskih sten v feroelektričnih in relaksorskih keramičnih materialih<o:p></o:p></span></b></span></span></span></span></span></p><p class=MsoNormal style='text-align:justify'><span style='mso-bookmark:_Hlk20313133'><span style='mso-bookmark:_Hlk41470923'><span style='mso-bookmark:_Hlk41995074'><span style='mso-bookmark:_Hlk89782604'><span style='mso-bookmark:_Hlk57188111'><o:p> </o:p></span></span></span></span></span></p><span style='mso-bookmark:_Hlk57188111'></span><p class=MsoNormal style='text-align:justify'><span style='mso-bookmark:_Hlk20313133'><span style='mso-bookmark:_Hlk41470923'><span style='mso-bookmark:_Hlk41995074'><span style='mso-bookmark:_Hlk89782604'><a name="_Hlk57031873">Domenske stene, ki ločujejo področja domen v feroelektričnih materialih, so izrednega pomena tako s praktičnega kot temeljnega vidika. Ključna lastnost domenskih sten je njihova dinamika, saj se lahko pod zunanjimi električnimi in mehanskimi polji znotraj materiala premikajo ali preklapljajo. Ta lastnost je pomembna ne le za delovanje uveljavljenih elektromehanskih naprav, kot so senzorji v pametnih telefonih, aktuatorji v digitalnih kamerah ali pa ultrazvočne sonde v medicini, ampak tudi za nove nano-elektronske naprave v razvoju. V predavanju se bom osredotočil na dve nedavni študiji s področja raziskav domenskih sten, in sicer v keramiki </a></span></span></span></span><span style='mso-bookmark:_Hlk20313133'><span style='mso-bookmark:_Hlk41470923'><span style='mso-bookmark:_Hlk41995074'><span style='mso-bookmark:_Hlk89782604'><span style='mso-bookmark:_Hlk57031873'><span lang=EN-GB>BiFeO<sub>3</sub></span> ter v relaksorskem feroelektriku </span></span></span></span></span><span style='mso-bookmark:_Hlk20313133'><span style='mso-bookmark:_Hlk41470923'><span style='mso-bookmark:_Hlk41995074'><span style='mso-bookmark:_Hlk89782604'><span style='mso-bookmark:_Hlk57031873'><span lang=EN-GB>Pb(Mg<sub>1/3</sub>Nb<sub>2/3</sub>)O<sub>3</sub>–PbTiO<sub>3</sub></span>. Obe sta namreč vzbudili prav posebno pozornost, celo polemiko med raziskovalci. Podatki, ki jih bom predstavil, so rezultat desetletnega raziskovanja, večinoma opravljenega na Institutu »Jožef Stefan«, ki so bila (in so še vedno) osredotočena na nenehno iskanje osnovne povezave med makroskopskim elektromehanskim odzivom tovrstnih kompleksnih materialov in njihovo hierarhično strukturo na različnih velikostnih stopnjah.<o:p></o:p></span></span></span></span></span></p><p class=MsoNormal style='text-align:justify'><span style='mso-bookmark:_Hlk20313133'><span style='mso-bookmark:_Hlk41470923'><span style='mso-bookmark:_Hlk41995074'><span style='mso-bookmark:_Hlk89782604'><span style='mso-bookmark:_Hlk57031873'><o:p> </o:p></span></span></span></span></span></p><p class=MsoNormal style='text-align:justify'><span style='mso-bookmark:_Hlk20313133'><span style='mso-bookmark:_Hlk41470923'><span style='mso-bookmark:_Hlk41995074'><span style='mso-bookmark:_Hlk89782604'><span style='mso-bookmark:_Hlk57031873'>Predavanje bo v angleščini.<o:p></o:p></span></span></span></span></span></p><span style='mso-bookmark:_Hlk57031873'></span><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt'><span style='mso-bookmark:_Hlk20313133'><span style='mso-bookmark:_Hlk41470923'><span style='mso-bookmark:_Hlk41995074'><span style='mso-bookmark:_Hlk89782604'><strong><span style='color:red'>Lepo vabljeni!</span></strong></span></span></span></span><span style='mso-bookmark:_Hlk89782604'><strong><span style='color:red'><o:p></o:p></span></strong></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt'><span style='mso-bookmark:_Hlk89782604'><strong><span style='color:red'><o:p> </o:p></span></strong></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt'><span style='mso-bookmark:_Hlk89782604'><strong><span style='font-size:11.0pt'> ******************************************<o:p></o:p></span></strong></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt'><span style='mso-bookmark:_Hlk89782604'><strong><span style='font-size:11.0pt;color:red'><o:p> </o:p></span></strong></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk89782604'><span style='color:black'>We invite you to the 3rd Institute colloquium in the academic year 2022/23. The colloquium will be held </span><b><span style='color:red'>on <a name="_Hlk105586554">Wednesday</a> November 16 2022 at <u>1 PM. </u></span></b>The lecturer will deliver a <b>live</b> lecture <b><span style='color:red'>in the main Institute lecture hall</span></b><span style='color:black'>, Jamova 39, Ljubljana, followed by a small banquet.<o:p></o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk89782604'><span style='color:black'><o:p> </o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk89782604'><span style='color:black'>To read the abstract click </span></span><a href="http://www.ijs.si/ijsw/Koledar_prireditev"><span style='mso-bookmark:_Hlk89782604'>http://www.ijs.si/ijsw/Koledar_prireditev</span><span style='mso-bookmark:_Hlk89782604'></span></a><span style='mso-bookmark:_Hlk89782604'><span style='color:#1F497D'>. </span><span style='color:black'>Past colloquia are posted on</span><span style='color:#1F497D'> </span></span><a href="https://bit.ly/2YH8LYk"><span style='mso-bookmark:_Hlk89782604'>Arhiv TV IJS</span><span style='mso-bookmark:_Hlk89782604'></span></a><span style='mso-bookmark:_Hlk89782604'> and<span style='color:#1F497D'> </span></span><a href="http://videolectures.net/kolokviji_ijs"><span style='mso-bookmark:_Hlk89782604'>http://videolectures.net/kolokviji_ijs</span><span style='mso-bookmark:_Hlk89782604'></span></a><span style='mso-bookmark:_Hlk89782604'><span style='color:#1F497D'>.<o:p></o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk89782604'><span style='color:#1F497D'><o:p> </o:p></span></span></p><p class=MsoNormal style='margin-bottom:12.0pt'><span style='mso-bookmark:_Hlk89782604'>********************************************<b><o:p></o:p></b></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk89782604'><b><span lang=EN-US>Prof. dr. Tadej Rojac<o:p></o:p></span></b></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk89782604'><i><span lang=EN-US>Institut »Jožef Stefan«<o:p></o:p></span></i></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk89782604'><b><i><span lang=EN-US><o:p> </o:p></span></i></b></span></p><p class=Default><span style='mso-bookmark:_Hlk89782604'><b><span style='font-size:14.0pt;font-family:"Times New Roman",serif;color:#202020;mso-fareast-language:SL'>Domain-wall dynamics in ferroelectric and relaxor-based ceramics<o:p></o:p></span></b></span></p><p class=Default><span style='mso-bookmark:_Hlk89782604'><span lang=EN-US style='font-family:"Times New Roman",serif'><o:p> </o:p></span></span></p><p class=MsoNormal style='text-align:justify'><span style='mso-bookmark:_Hlk89782604'>The interfaces separating domain regions in ferroelectrics, the so-called domain walls, are of paramount importance both from practical and fundamental aspects. The key property of domain walls is their dynamics, i.e., they can be displaced and switched under external electric or mechanical fields, which is important not only for the operation of well-established electromechanical devices, such as sensors in smart phones, actuators in digital cameras or ultrasound imaging probes in medicine, but also for the newly emerging nanoelectronic devices. In this talk, I will present two recent case studies from the exciting research on domain walls that raised particular attention and controversy; one is focused on the ceramic </span><span style='mso-bookmark:_Hlk89782604'><span lang=EN-GB style='font-family:"Calibri",sans-serif'>BiFeO<sub>3</sub></span>, and the other on the relaxor-ferroelectric </span><span style='mso-bookmark:_Hlk89782604'><span lang=EN-GB>Pb(Mg<sub>1/3</sub>Nb<sub>2/3</sub>)O<sub>3</sub>–PbTiO<sub>3</sub></span>. The presented data are based on a decade of studies, mostly performed at Jožef Stefan Institute, which were (and still are) focused on the perpetual search of the basic relationship between the macroscopic electromechanical response and the multiscale hierarchical structure of these complex materials.<o:p></o:p></span></p><p class=MsoNormal style='text-align:justify'><span style='mso-bookmark:_Hlk89782604'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk89782604'>Cordially invited!<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt'><span style='mso-bookmark:_Hlk89782604'><b><o:p> </o:p></b></span></p><span style='mso-bookmark:_Hlk89782604'></span><p class=MsoNormal><strong><o:p> </o:p></strong></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>