IJS KOLOKVIJ, četrtek, 27. 3. 2025, ob 13. uri, prof. dr. John E. Greedan

[Natasa Goševac]

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

Vabimo vas na predavanje v okviru »Kolokvijev IJS« ob letošnjih Dnevih Jožefa Stefana, ki bo danes, v četrtek, 27. marca 2025, 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.

 

Povezava med strukturo in lastnostmi v perovskitnih oksidih

 

prof. dr. John E. Greedan

Univerza McMaster, Hamilton, Kanada

 

 

Perovskiti predstavljajo obsežno družino materialov s številnimi pomembnimi aplikacijami na področjih, kot so dielektriki, superprevodnost in fotovoltaika. Z vidika strukturne kemije je osnovni perovskit, ABO3, izhodišče za številne vrste struktur, ki nastanejo s substitucijami na mestih A in B, kristalografskim urejanjem na teh mestih, medsebojnim zraščanjem z drugimi vrstami struktur in z znatnimi stopnjami praznin na mestih A in O. Približno 80% stabilnih kemijskih elementov je mogoče vključiti v perovskitne strukture in iz njih izpeljane strukture, kar ponuja veliko možnosti za kemijske manipulacije, ki vplivajo na spremembe fizikalnih lastnosti. Predstavil bom izbrane primere medsebojno zraščenih materialov in dvojnih perovskitov z ureditvijo kationov na mestu B v okviru nizkodimenzionalnega in geometrično frustriranega magnetizma.

 

O predavatelju: John E. Greedan je zaslužni profesor na Oddelku za kemijo Univerze McMaster v Hamiltonu v Kanadi. Za svoje delo na področju sinteze materialov in proučevanja njihovih lastnosti z uklonskimi tehnikami je leta 2024 prejel nagrado Ameriškega kristalografskega združenja.

 

 

Napovednik predavanja in posnetke preteklih predavanj najdete na spletni strani »Kolokvijev na IJS«  <https://kolokviji.ijs.si/> https://kolokviji.ijs.si/, posnetke pa tudi posebej na  <https://video.arnes.si/?q=Kolokviji_IJS> https://video.arnes.si/?q=Kolokviji_IJS (zadnje štiri 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, Thursday, March 27, 2025, 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.

 

 

Structure/property nexus in perovskite oxides

 

Prof. Dr. John E. Greedan

McMaster University, Hamilton, Canada

 

 

Perovskites comprise a vast family of materials with many important applications in areas such as dielectrics, superconductivity and photovoltaics, among others. From a structural chemical perspective, the basic perovskite, ABO3, is the parent of a large variety of structure types obtained by substitutions on both the A and B sites, crystallographic ordering on these sites, intergrowth with other structure types and significant levels of vacancies on both the A and O sites. About 80% of the stable chemical elements can be accommodated within the perovskite and perovskite derived structures providing many opportunities for chemical manipulations, which drive changes in physical properties. I will showcase selected examples of intergrowth materials and double perovskites with B-site cation ordering in the context of low-dimensional and geometrically frustrated magnetism.

 

About the lecturer: John E. Greedan is professor emeritus in the Department of Chemistry at McMaster University in Hamilton, Canada. In 2024, he received the Bertram Eugene Warren Diffraction Physics Award by American Crystallographic Association for his contributions to the synthesis of materials and their study using diffraction techniques.

 

 

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

 

 

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