Monitoring Laser-Induced Magnetization In Ferh By Transient Terahertz Emission Spectroscopy
APPLIED PHYSICS LETTERS(2020)
Abstract
In this study, a conceptually different approach for investigating magnetic phase transitions in ultra-thin films is presented. THz emission from a laser-excited material is used to monitor the magnetization dynamics during the laser-driven antiferromagnetic to ferromagnetic transition in FeRh. The emitted THz signal is calibrated against static magnetometry data measurements, giving a direct measure of the absolute magnetic moment of the sample on the sub-picosecond timescale. The technique is, therefore, highly complementary to conventional time-resolved experiments such as time resolved magneto-optic Kerr effect (MOKE) or x-ray magnetic circular dichroism. (C) 2020 Author(s).
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Key words
magnetization,spectroscopy,ferh,laser-induced
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