IJS KOLOKVIJ, petek, 22. 3. 20224, ob 13. uri, prof. dr. J. Paul Attfield

[Nataša Goševac]

 <https://dnevi.ijs.si/> 

 

Vabimo vas na predavanje v okviru »Kolokvijev IJS« ob letošnjih Dnevih Jožefa Stefana, ki bo danes, v petek, 22. marca 2024, ob 13:00 v Veliki predavalnici Instituta »Jožef Stefan« na Jamovi cesti 39 v Ljubljani. Predavanje bo v angleščini. Na voljo bodo kava, pijača in prigrizki.

 

Novi materiali pri visokih tlakih

 

prof. dr. J. Paul Attfield

Center za raziskave pri esktremnih pogojih in Univerza v Edinburghu, Velika Britanija

 

 

Odkrivanje novih materialov je pomembno za temeljno znanost in lahko vodi do energetskih, okoljskih in številnih drugih aplikacij. Visokotlačne metode so pomembne za sintezo novih materialov in za raziskovanje sprememb v strukturi in lastnostih v gosti snovi. Predstavil bom nove oksidne in nitridne materiale, ki smo jih nedavno sintetizirali v naši skupini in so zanimivi za elektronske in energetske aplikacije. Prvi primer so oksidni perovskiti z Mn2+ na mestih A, ki so zanimivi za magnetne in spintronske aplikacije. Drugi primer je nedavni izjemen razpon novih železnih oksidov sintetiziranih pri visokih tlakih. Raziskali smo substitucijsko kemijo Fe4O5, kjer bom opisal primer CaFe3O5 pripravljenega pri običajnem tlaku, ki kaže elektronsko ločitev faz. Nazadnje smo nedavno razvili visokotlačno metodo z uporabo natrijevega azida za sintezo nitridov v visokih oksidacijskih stanjih, s pomočjo katere smo prišli do novih nitridnih perovskitov, kot je LaReN3, in prvih primerov Ruddlesden-Popperjevih (to je plastovito perovskitnih) nitridov.

 

O predavatelju: J. Paul Attfield vodi Katedro za znanost o materialih pri ekstremnih pogojih na Fakulteti za kemijo in Centru za raziskave pri ekstremnih pogojih Univerze v Edinburghu. Je prejemnik medalj Meldole in Corday-Morgana ter nagrade Petra Daya s strani Royal Society of Chemistry, leta 2014 pa je bil izvoljen za člana Kraljeve družbe.

 

 

Napovednik predavanja in posnetke preteklih predavanj najdete na novi spletni strani »Kolokvijev IJS«  <https://kolokviji.ijs.si/> https://kolokviji.ijs.si/, posnetke pa tudi posebej na  <https://video.arnes.si/?hashtag=Kolokviji_IJS> https://video.arnes.si/?hashtag=Kolokviji_IJS (zadnje tri sezone) in  <http://videolectures.net/kolokviji_ijs> http://videolectures.net/kolokviji_ijs (starejši).

 

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We invite you to the lecture in the framework of »JSI Colloquia« on this year's Jožef Stefan days, which will take place today, Friday, March 22, 2024, at 1:00 PM in the main lecture hall of Jožef Stefan Institute, Jamova cesta 39 in Ljubljana. The lecture will be held in English. Coffee, drinks and snacks will be available.

 

 

New materials from high pressure

 

Prof. dr. J. Paul Attfield

Centre for Science at Extreme Conditions and University of Edinburgh, United Kingdom

 

 

Discovery of new materials is important to fundamental science and can lead to energy, environmental and many other applications. High pressure methods are important for synthesising new materials and for exploring changes of structure and properties in dense matter. I will present new oxide and nitride materials recently synthesized by our group and of interest for electronic and energy applications. The first example are oxide perovskites with Mn2+ at A sites of interest for magnetic and spintronic applications. Second, a remarkable variety of new iron oxides has recently been reported at high pressures, and we have explored the substitutional chemistry of Fe4O5. For instance, CaFe3O5 prepared at ambient pressure shows electronic phase separation. Finally, we have recently developed a high pressure method using sodium azide to synthesise nitrides in high oxidation states giving novel nitride perovskites such as LaReN3, and the first examples of Ruddlesden-Popper (i.e., layered perovskite) nitrides.

 

About the lecturer: J. Paul Attfield holds a Chair in Materials Science at Extreme Conditions at the School of Chemistry and Centre for Science at Extreme Conditions, University of Edinburgh. He received the Royal Society of Chemistry’s Meldola and Corday-Morgan medals and Peter Day award, and he was elected a Fellow of the Royal Society in 2014.

 

 

The lecture trailer and recordings of past lectures can be found on the new website of »JSI colloquia«  <https://kolokviji.ijs.si/> https://kolokviji.ijs.si/, and recordings specifically at  <https://video.arnes.si/en/?hashtag=Kolokviji_IJS> https://video.arnes.si/en/?hashtag=Kolokviji_IJS (last three seasons) and  <http://videolectures.net/kolokviji_ijs> http://videolectures.net/kolokviji_ijs (older).

 

 

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