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</o:shapelayout></xml><![endif]--></head><body link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><a name="_Hlk20313133"><span lang=SL>Vabimo vas na 12. predavanje iz sklopa "Kolokviji na IJS" v letu 2019/20, ki bo <strong><span style='color:red'>v sredo, 3. junija 2020, ob 13. uri </span></strong>zopet v Veliki predavalnici Instituta »Jožef Stefan« na Jamovi cesti 39 v Ljubljani. Predavanje lahko spremljate tudi na youtubu na</span></a><span style='mso-bookmark:_Hlk20313133'><span lang=SL style='font-size:11.0pt;mso-fareast-language:#1000'> </span><span lang=SL>spletnem naslovu </span></span><a href="https://www.youtube.com/watch?v=_MLT_8FnB_s&feature=youtu.be"><span style='mso-bookmark:_Hlk20313133'><span lang=SL>https://www.youtube.com/watch?v=_MLT_8FnB_s&feature=youtu.be</span></span><span style='mso-bookmark:_Hlk20313133'></span></a><span style='mso-bookmark:_Hlk20313133'><strong><span style='font-size:11.0pt;mso-fareast-language:#1000;font-weight:normal'><o:p></o:p></span></strong></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk20313133'><span lang=SL>Napovednik predavanja najdete tudi na naslovu </span></span><a href="http://www.ijs.si/ijsw/Koledar_prireditev"><span style='mso-bookmark:_Hlk20313133'><span lang=SL>http://www.ijs.si/ijsw/Koledar_prireditev</span></span><span style='mso-bookmark:_Hlk20313133'></span></a><span style='mso-bookmark:_Hlk20313133'><span lang=SL>, posnetke preteklih predavanj<span style='color:blue'> </span>pa na </span></span><a href="http://videolectures.net/kolokviji_ijs"><span style='mso-bookmark:_Hlk20313133'><span lang=SL>http://videolectures.net/kolokviji_ijs</span></span><span style='mso-bookmark:_Hlk20313133'></span></a><span style='mso-bookmark:_Hlk20313133'><span lang=SL>. <o:p></o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk20313133'><span lang=SL>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br><br></span></span><span style='mso-bookmark:_Hlk20313133'><b><span lang=EN-US><o:p></o:p></span></b></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk20313133'><b><span lang=EN-US>prof. dr. Darja Lisjak<o:p></o:p></span></b></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk20313133'><i><span lang=EN-US>Institut Jožef Stefan, Ljubljana <o:p></o:p></span></i></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk20313133'><i><span lang=EN-US><o:p> </o:p></span></i></span></p><p class=MsoNormal style='text-align:justify'><span style='mso-bookmark:_Hlk20313133'><b><span lang=SL style='font-size:14.0pt'>Heksaferiti: raznovrstni in edinstveni magnetni materiali <o:p></o:p></span></b></span></p><p class=MsoNormal style='text-align:justify'><span style='mso-bookmark:_Hlk20313133'><span lang=SL><o:p> </o:p></span></span></p><p class=MsoNormal style='text-align:justify'><span style='mso-bookmark:_Hlk20313133'><span lang=SL>Heksaferiti so posebna vrsta magnetnih materialov in osnovni gradniki, nedavno odkritih, feromagnetnih tekočin. Najdemo jih v faznem diagramu MOFe2O3MeO (M = dvovalentna kovina z velikim ionskim radijem, Me = dvovalentna prehodna kovina). Heksaferiti različnih kemijskih sestav kristalizirajo v številnih strukturnih politipih. Vsi heksaferitni politipi rastejo v obliki heksagonalnih ploščic in imajo enoosno magneto-kristalno anizotropijo, zaradi česar so primerni za trajne magnete, magnetno zapisovanje, mikrovalovne magnetne naprave in asborberje. Heksaferiti tipa M imajo najbolj enostavno strukturo in so tudi najbolje raziskani, kar še posebej velja za Ba heksaferit s kemijsko sestavo BaFe12O19. Lahka os magnetizacije Ba heksaferita je pravokotna na osnovno ravnino ploščice, kar je značilno samo za nekatere politipe heksaferitov in edinstveno med magnetnimi materiali. Zaradi te posebne lastnosti lahko posamezne nanoploščice Ba heksaferita vodimo z zelo šibkim zunanjim magnetnim poljem, primerljivim z Zemljinim. S prilagajanjem interakcij med nanoploščicami Ba heksaferita smo odkrili veliko zanimivih lastnosti le-teh ter celo nove materiale, kot npr. feromagnetne suspenzije in tekoče magnete. Povzeli bomo dve desetletji raziskav na Institutu Jožef Stefan, ki so vodile do teh odkritij.<o:p></o:p></span></span></p><p class=MsoNormal style='text-align:justify'><span style='mso-bookmark:_Hlk20313133'><span lang=SL><o:p> </o:p></span></span></p><p class=MsoNormal style='text-align:justify'><span style='mso-bookmark:_Hlk20313133'><span lang=SL>Predavanje bo v angleščini.<o:p></o:p></span></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt'><span style='mso-bookmark:_Hlk20313133'><strong><span lang=SL style='color:red'>Lepo vabljeni!<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:_Hlk20313133'><strong><span lang=SL style='font-weight:normal'> *****<o:p></o:p></span></strong></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk20313133'><span lang=SL style='color:black'>We invite you to the 12th Institute colloquium in the academic year 2019/20. The colloquium will be held </span><b><span lang=SL style='color:red'>on Wednesday June 3, 2020 at 1 PM</span></b><span lang=SL style='color:red'> </span><span lang=SL>in the main Institute lecture hall, Jamova 39, Ljubljana. The colloquium will also be aired live on youtube at </span></span><a href="https://www.youtube.com/watch?v=_MLT_8FnB_s&feature=youtu.be"><span style='mso-bookmark:_Hlk20313133'><span lang=SL>https://www.youtube.com/watch?v=_MLT_8FnB_s&feature=youtu.be</span></span><span style='mso-bookmark:_Hlk20313133'></span></a><span style='mso-bookmark:_Hlk20313133'><span lang=SL style='font-size:11.0pt;mso-fareast-language:#1000'><o:p></o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk20313133'><span lang=SL style='color:black'>To read the abstract click </span></span><a href="http://www.ijs.si/ijsw/Koledar_prireditev"><span style='mso-bookmark:_Hlk20313133'><span lang=SL>http://www.ijs.si/ijsw/Koledar_prireditev</span></span><span style='mso-bookmark:_Hlk20313133'></span></a><span style='mso-bookmark:_Hlk20313133'><span lang=SL style='color:#1F497D'>. </span><span lang=SL style='color:black'>Past colloquia are posted on</span><span lang=SL style='color:#1F497D'> </span></span><a href="http://videolectures.net/kolokviji_ijs"><span style='mso-bookmark:_Hlk20313133'><span lang=SL>http://videolectures.net/kolokviji_ijs</span></span><span style='mso-bookmark:_Hlk20313133'></span></a><span style='mso-bookmark:_Hlk20313133'><span lang=SL style='color:#1F497D'>.</span></span><span style='mso-bookmark:_Hlk20313133'><span style='font-size:11.0pt;mso-fareast-language:#1000'><o:p></o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk20313133'><span lang=SL style='color:#1F497D'><o:p> </o:p></span></span></p><p class=MsoNormal style='margin-bottom:12.0pt'><span style='mso-bookmark:_Hlk20313133'><span lang=SL>********************************************<strong><o:p></o:p></strong></span></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk20313133'><b><span lang=EN-US>prof. dr. Darja Lisjak</span></b></span><span style='mso-bookmark:_Hlk20313133'><span lang=EN-US><o:p></o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk20313133'><i><span lang=EN-US>Jožef Stefan Institute, Ljubljana, Slovenia<o:p></o:p></span></i></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk20313133'><strong><span lang=SL style='font-weight:normal'><o:p> </o:p></span></strong></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk20313133'><b><span lang=EN-GB style='font-size:14.0pt;font-family:"Cambria",serif'>Hexaferrites: Versatile and unique magnetic materials<o:p></o:p></span></b></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk20313133'><span lang=SL><o:p> </o:p></span></span></p><p class=MsoNormal style='text-align:justify'><span style='mso-bookmark:_Hlk20313133'><span lang=EN-GB style='font-family:"Cambria",serif'>Hexaferrites are a special class of magnetic materials that constitute recently discovered ferromagnetic liquids. They are found in the ternary phase diagram MO</span></span><span style='mso-bookmark:_Hlk20313133'><span lang=EN-GB style='font-family:Symbol'>-</span></span><span style='mso-bookmark:_Hlk20313133'><span lang=EN-GB style='font-family:"Cambria",serif'>Fe<sub>2</sub>O<sub>3</sub></span></span><span style='mso-bookmark:_Hlk20313133'><span lang=EN-GB style='font-family:Symbol'>-</span></span><span style='mso-bookmark:_Hlk20313133'><span lang=EN-GB style='font-family:"Cambria",serif'>MeO, where M is a large bivalent metal and Me is a bivalent transition metal. Hexaferrites with different chemical compositions crystallize in numerous structural polytypes. All polytypes grow as thin hexagonal platelets with uniaxial magneto-crystalline anisotropy, which makes them suitable for permanent magnets, magnetic recording, microwave magnetic devices and absorbers. Structurally the simplest and the most studied hexaferrites are of M-type, in particular Ba hexaferrite with the chemical composition of Ba</span></span><span style='mso-bookmark:_Hlk20313133'><span lang=EN-US style='font-family:"Cambria",serif'>Fe<sub>12</sub>O<sub>19</sub>. Its magnetic easy axis is perpendicular to the basal plane of a platelet, which is unique only to some hexaferrite polytypes among all known magnetic materials. As a consequence, individual Ba hexaferrite nanoplatelets can be </span></span><span style='mso-bookmark:_Hlk20313133'><span lang=EN-GB style='font-family:"Cambria",serif'>manipulated by a weak external magnetic field comparable to the Earth's magnetic field. By tuning the interactions between the Ba hexaferrite nanoplatelets, many interesting behaviours and even new materials like ferromagnetic suspensions and liquid magnets were discovered. We will summarize two decades of the research at the Jožef Stefan Institute that led to those discoveries.<o:p></o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk20313133'><span lang=SL><o:p> </o:p></span></span></p><span style='mso-bookmark:_Hlk20313133'></span><p class=MsoNormal><span lang=SL>Cordially invited!<o:p></o:p></span></p><p class=MsoNormal style='text-align:justify'><span lang=SL><o:p> </o:p></span></p><p class=MsoNormal><span lang=SL><o:p> </o:p></span></p></div></body></html>