Speaker: Elton J. G. Santos Affiliation: The University of Edinburgh Title: Exploring the Limits of Ultrafast Magnetism in van der Waals Magnets Host: CD Phatak Date/Time: Thursday, April 3, 2025 1:00 PM Hybrid Zoom: https://argonne.zoomgov.com/j/1600068366?pwd=Ed8Nw6Y2gw562kk07wpXTPTMV0uhJL.1#success Abstract: Long searched but only now discovered two-dimensional (2D) magnets are one of the selected group of materials that retain or impart strongly spin correlated properties at the limit of atomic layer thickness. In this presentation, I will discuss how different layered compounds (e.g., CrX3 (X=F, Cl, Br, I), MnPS3, Fe5-xGeTe2, Cr2Ge2Te6) can provide new playgrounds for applications and fundamental exploration of spin correlations involving quantum-effects, topological spin-excitations and ultrafast laser pulses. In particular, I will show how van der Waals magnets do not require any magnetic anisotropy to stabilize 2D magnetism and demonstrate the null valid of the Mermin-Wagner theorem in practical applications. Moreover, some recent results of ultrafast laser excitations on different vdW heterostructures will be shown towards all-optical control of their magnetic properties with efficient heat management. Co-sponsored by: IEEE Chicago, IEEE NTC Young Professionals 9700 S Cass Ave, Argonne National Laboratory, LEMONT, Illinois, United States, 60439, Virtual: https://events.vtools.ieee.org/m/479576

With spring comes the onset of the severe weather conditions the Midwest is noted for. Knowing how to access the approaching weather is the first step intaking appropriate precautions to keep safe. Radar can only supply part of ht33e information needed to assess a weather situation. The National Weather Service relies on first-person reports from people in the field with eyes on the weather phenomenon. Eyewitness accounts in addition to radar returns allows the most accurate depiction of the weather. Even if you do not plan to actively pursue weather spotting knowing what is approaching and what actions to take can help save your life and the3e lives of those around you. The Severe Weather Spotting course will prepare you to determine the severity of the approaching weather and give you the tools to take the best course of action. Included is material on the types of weather most frequently encountered this time of the year, how to read the sky and assess the type of weather approaching, and the correct course of action to ensure safety. Attendees will also be supplied with contact numbers for the NWS and given information on how to report weather conditions. This course is taught by veteran NWS instructors. Attendees will receive certificates of completion. Co-sponsored by: Hamfesters Radio Club SouthBridge Community Church, 15500 73rd Ave, Orland Park, Illinois, United States, 60462, Virtual: https://events.vtools.ieee.org/m/474512