Monitoring laser-induced magnetization in FeRh by transient terahertz emission spectroscopy

Monitoring laser-induced magnetization in FeRh by transient terahertz emission spectroscopy

Článek WoS

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).

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).

SPIN DYNAMICS; ULTRAFAST; FILMS

SPIN DYNAMICS; ULTRAFAST; FILMS

Awari, N .; Semisalova, A.; Deinert, JC.; Lenz, K.; Lindner, J.; Fullerton, E.; Uhlir, V.; Li, J.; Clemens, B.; Carley, R.; Scherz, A.; Kovalev, S.; Gensch, M.

2021

21.09.2020

AMER INST PHYSICS

MELVILLE

1077-3118

APPLIED PHYSICS LETTERS

117

12

Spojené státy americké

122407-1

122407-6

6

https://aip.scitation.org/doi/10.1063/5.0019663