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CATEGORIES:Conferences/Seminars/Lectures
DESCRIPTION:Mapping three-dimensional atomic order in rare earth iron garne
 ts\n\nTuesday\, February 6\, 2024\n11 a.m. — 11:45 a.m. ET\n\nRegister\n\nA
 llison Kaczmarek\, PhD Candidate\nMaterials Science & Engineering\, MIT\n\n
 Complex oxides offer rich magnetic and electronic behavior intimately tied 
 to the composition and arrangement of cations within the structure. When a 
 crystallographic site is populated by more than one type of ion\, ordering 
 of those ions can dramatically affect the material properties. Rare earth i
 ron garnets are a class of ferrimagnetic complex oxides with extraordinary 
 properties\, making them essential materials for microwave and optical devi
 ces. Thin films of these materials exhibit a magnetic anisotropy along the 
 growth direction which has long been believed\, but not proven\, to origina
 te from the ordering of rare earth cations on dodecahedral sites.\n\nIn thi
 s presentation\, Kaczmarek will discuss how researchers uncovered the three
 -dimensional ordering of rare earth ions in films of europium thulium iron 
 garnet using both X-ray diffraction and atomically resolved elemental mappi
 ng\, specifically by aberration-corrected scanning transmission electron mi
 croscopy (STEM). Further\, they quantified the resulting ordering-induced ‘
 magnetotaxial’ anisotropy as a function of Eu:Tm ratio. By solving this 50-
 year-old mystery\, researchers have demonstrated that site ordering provide
 s a powerful strategy to control matter on the atomic level and to augment 
 the magnetic properties of complex oxides.\n\nAttendees can join and partic
 ipate in the series via Zoom. \n\n------------------------------------\n\nN
 ano Explorations started in 2020 as a way to keep our nano network connecte
 d during the COVID-19 pandemic. Its effective sharing of knowledge and posi
 tive community impact led to the continuation of this series into today. Th
 e talks are free and open to any interested viewers. See past and upcoming 
 webinars at mitnano.mit.edu/nano-explorations.
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SUMMARY:Nano Explorations: Mapping three-dimensional atomic order in rare e
 arth iron garnets
UID:tag:localist.com\,2008:EventInstance_45402150774999
URL:https://calendar.mit.edu/event/nano_explorations_mapping_three-dimensio
 nal_atomic_order_in_rare_earth_iron_garnets
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