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May20
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ECE Seminar: Dr. Sergi Lendinez (University of Delaware), 'Vortex motion excited by spin orbit torques'.Speaker: Dr. Sergi Lendinez (Department of Physics and Astronomy, University of Delaware)
Title: Vortex motion excited by spin orbit torques
Abstract: Sergi Lendinez1, 2, Tomas Polakovic3, Junjia Ding2, Benjamin Jungfleisch1, John Pearson2, Axel Hoffmann2, Valentine Novosad2
1Department of Physics and Astronomy, University of Delaware, Newark, DE 19716
2Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
3Physics Division, Argonne National Laboratory, Argonne, IL 60439The development of new memory technologies requires a decrease in the current density and a better efficiency of the devices. Spin torque is a way to efficiently drive dynamics that shows potential for implementation in future devices. High frequency dynamics (in the range of tens of GHZ) have been intensively studied due to the high switching speeds in the ns range. Spin orbit torques, that can be achieved using simple fabrication structures, have been used mostly to excite these high frequency dynamics. However, lower frequency dynamics below 1 GHz are also interesting since in this frequency range magnetic domains and magnetic structures dominate the dynamics. In this talk, I will show that it is possible to observe low-frequency dynamics, in particular vortex gyrotropic motion, using spin orbit torques. Micromagnetic simulations support the dynamic spin torque measurements, as well as the magnetic transport measurements. Our results are of importance to integrate spin-orbit-torque to excite magnetic vortices in spintronic devices.
Bio: Sergi Lendinez is a postdoctorate researcher in the Department of Physics and Astronomy at the University of Delaware. Before joining Prof. Jungfleisch’s group, he was a postdoctoral appointee in the Magnetic Films Group in the Materials Science Division at Argonne National Laboratory. His work is in the field of magnetization dynamics in magnetic thin films and in patterned structures. The main focus of his work is on the study of propagation of spin waves in different media and possible applications in spintronic devices. Sergi received his PhD from the University of Barcelona, Spain. He did part of his PhD at Paul Drude Institute, Germany, and at Argonne National Laboratory.TIME Monday, May 20, 2019 at 2:00 PM - 3:00 PM
LOCATION L440, Technological Institute map it
CONTACT Lana Kiperman lana@ece.northwestern.edu EMAIL
CALENDAR Department of Electrical and Computer Engineering
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Aug20
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Join us to explore the McCormick School of Engineering’s strategic vision and its vital role in advancing Northwestern’s top priorities. From groundbreaking research to transformative education, Northwestern Engineering is shaping solutions to the world’s most pressing challenges and working to advance Northwestern. During this presentation, you will learn directly from Dean Christopher Schuh on how our alumni community can come together to amplify this impact—through engagement, mentorship, philanthropy, and industry connections. Learn how your involvement can help unlock bold ideas and ensure Northwestern remains a global leader in engineering and beyond.
Event Contact Info
NAA Alumni Education
alumnieducation@northwestern.eduTIME Wednesday, August 20, 2025 at 12:00 PM - 1:00 PM
CONTACT Andi Joppie andi.joppie@northwestern.edu EMAIL
CALENDAR McCormick School of Engineering and Applied Science
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Sep8
EVENT DETAILS
Enjoy a welcome from Dean Christopher A. Schuh and other McCormick leaders, and receive a Northwestern Engineering T-shirt. A free light breakfast on the Tech East Plaza will follow.
TIME Monday, September 8, 2025 at 9:00 AM - 10:00 AM
LOCATION LR2 & Tech East Plaza, Technological Institute map it
CONTACT Andi Joppie andi.joppie@northwestern.edu EMAIL
CALENDAR McCormick School of Engineering and Applied Science
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Sep12
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New Undergraduate Fall 2025 Registration
TIME Friday, September 12, 2025
CONTACT Office of the Registrar nu-registrar@northwestern.edu EMAIL
CALENDAR University Academic Calendar
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Sep15
EVENT DETAILS
Enjoy a welcome from Dean Christopher A. Schuh and other McCormick leaders, and receive a Northwestern Engineering T-shirt. A free lunch on the Tech East Plaza will follow.
TIME Monday, September 15, 2025 at 11:00 AM - 12:30 PM
LOCATION Ryan Auditorium & Tech East Plaza, Technological Institute map it
CONTACT Andi Joppie andi.joppie@northwestern.edu EMAIL
CALENDAR McCormick School of Engineering and Applied Science
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Sep16
EVENT DETAILS
Fall Classes Begin. Change of Registration (Drop/Add) Late registration for returning students begins
TIME Tuesday, September 16, 2025
CONTACT Office of the Registrar nu-registrar@northwestern.edu EMAIL
CALENDAR University Academic Calendar