SEM MSS 2: Teresa Jeffrey with Sklenar Lab at WSU & Thomas J. Meitzler
IEEE SEM Magnetics Seminar Series: Technical Meetings for the SEM Chapter of the IEEE Magnetics Society
This is the second session of the IEEE SEM Magnetics Seminar Series. This series of seminars constitutes the Technical Meetings for the SEM Chapter of the IEEE Magnetics Society.
Our second seminar will be held at the campus of Wayne State University, where the format will be in-person. Our speakers will be Teresa Jeffrey and Thomas J. Meitzler. The meeting will begin with pizza and social time, followed by a brief introduction to the Sklenar Lab at WSU.
If you are interested, please save this date and confirm your attendance.
Date and Time
Location
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- Date: 25 Oct 2024
- Time: 02:30 PM to 05:00 PM
- All times are (UTC-04:00) Eastern Time (US & Canada)
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- 666 W. Hancock St.
- Detroit, Michigan
- United States 48201
- Building: Physics Research Building
- Room Number: 245
- Click here for Map
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- Co-sponsored by Cody Trevillian
- Starts 28 September 2024 12:00 AM
- Ends 25 October 2024 05:00 PM
- All times are (UTC-04:00) Eastern Time (US & Canada)
- No Admission Charge
Speakers
Teresa Jeffrey of Wayne State University
Examining how effectively circularly polarized THz waves drive antiferromagnetic resonance within crystalline antifer...
In this work, we use frequency-domain THz spectroscopy to characterize the antiferromagnetic resonance of three different orientations of monocrystalline nickel oxide (NiO). Our spectroscopy system generates a circularly polarized THz beam, with a frequency that can be adjusted between 100 - 1800 GHz. We experimentally find that the (100) and (110) orientations of NiO more strongly absorb the THz radiation compared with the (111) sample at the expected resonance frequency near 1000 GHz. To explain our experimental results, we created a macrospin model of an easy-plane antiferromagnet that is driven by a circularly polarized driving field. The model considers both the orientation of the Néel vector in the plane with respect to the orientation of the polarized driving field, φ, and the misalignment of the easy-plane with the optical axis of the THz beam, θ. Additionally, the anisotropic effects from Spin (S) and Twin (T) domains within NiO further influence φ and θ, respectively. Our model predicts that the (111) orientation of NiO most weakly couples to the circularly polarized driving field, in qualitative agreement with our experimental results. In general, our model predicts that the misalignment of the easy plane with the optical axis strongly influences the absorption of circularly polarized THz radiation and that, to a lesser effect, there is a minute dependence on the orientation of the Néel vector within the plane.
Biography:
Teresa Jeffrey is currently a Physics PhD candidate at Wayne State University (2019-present). Her research interests include spintronics and magnetism, specifically the study of magnetization dynamics within antiferromagnets. She is also passionate about education, serving as a graduate teaching assistant and working to empower students in the classroom.
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Thomas J. Meitzler of Oakland University
Recent experimental results on embedding spintronic microwave detector circuits into protective materials
This talk will entail recent experiments done by the author to embed spintronic microwave detector circuits into protective materials. The work was a collaboration between Oakland University and the US Army DEVCOM Ground Vehicle Systems Center.
Biography:
Thomas J. Meitzler received his B.S. and M.S. in Physics from Eastern Michigan University, attended the Univ. of Michigan, and received a Ph.D. in Electrical Engineering from Wayne State University in Detroit. He has taught Physics, Astronomy and Engineering courses at The University of Michigan-Dearborn and Henry Ford Community College. From 1988 to present he has been a research engineer at the U.S. Army Tank Automotive RDEC in Warren in the department of Survivability Technology. He has published many papers on infrared and visual detection computational methods and infrared electro-optic system simulation. Dr. Meitzler is a co-winner of the 1995, 2010 and 2013 U.S. Army Research and Development Achievement award and has several patents and over 100 peer reviewed papers. His research interests include sensor and image fusion, non-destructive testing and imaging, functional magnetic resonance, 3D- imaging technologies, spintronics and pulsed magnetic fields. He has been the technical lead in projects with NASA's Kennedy Space Center, Columbia University , General Motors and Ford Research Laboratories as well as a fellow of the American Physical Society and Senior Life member of the IEEE and SPIE.
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Agenda
Note that this event is held in person only.
2:30 PM - SEM Magnetics Seminar Series 2 begins. Pizza is available.
2:45 PM - Brief introduction to Sklenar Lab at WSU.
3:00 PM - Teresa Jeffrey presentation & questions.
4:00 PM - Thomas J. Meitzler presentation & questions.
5:00 PM - SEM Magnetics Seminar Series 2 ends.
If you are interested, please save this date and confirm your attendance.
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