Demonstration of high-throughput magnetic hysteresis measurements based on spintronic THz emission

Spintronic terahertz (THz) emitters have been shown to be a cost-efficient source for use in time-domain THz spectroscopy. The use of external magnetic fields to control the polarity of the THz emission provides an opportunity to measure the magnetization of spintronic materials as well as shaping T...

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Bibliographic Details
Published in:Journal of applied physics 2023-12, Vol.134 (23)
Main Authors: DeCamp, M. F., Bhatt, S., Hossain, M. T., Wu, W., Jungfleisch, M. B.
Format: Article
Language:English
Subjects:
Applied physics
Emitters
Hysteresis
Magnetic measurement
Magnetization
Measurement methods
Spatial resolution
Time domain analysis
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Summary:Spintronic terahertz (THz) emitters have been shown to be a cost-efficient source for use in time-domain THz spectroscopy. The use of external magnetic fields to control the polarity of the THz emission provides an opportunity to measure the magnetization of spintronic materials as well as shaping THz emission. Here, we demonstrate an efficient method of measuring magnetic hysteresis with material sensitivity and speed several orders of magnitude greater than typical magnetometry methods. In addition, we utilize the rapid control of material magnetization for lock-in detection in time-domain THz spectroscopy of spintronic emitters. The ability to rapidly control and measure the material magnetization on very small volumes provides an opportunity to study magnetic hetero-structures with sub-micron spatial resolution.
ISSN:0021-8979
1089-7550
DOI:10.1063/5.0165081