Exploring terahertz-scale exchange resonances in synthetic ferrimagnets with ultrashort optically induced spin currents

Using spin currents generated by fs laser pulses, we demonstrate excitation of GHz ferromagnetic resonance and THz ferrimagnetic exchange resonances in Co/Gd/Co/Gd multilayers by time-resolved magneto-optic Kerr effect measurements. Varying the Gd layer thickness allows for a tuning of the resonance...

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Veröffentlicht in:	arXiv.org 2023-06
Hauptverfasser:	Hintermayr, Julian, Youri L W van Hees, Koopmans, Bert
Format:	Artikel
Sprache:	eng
Schlagworte:	Amplitudes Angular momentum Antiferromagnetism Compensation Exchanging Excitation Ferrimagnets Ferromagnetic resonance Ferromagnetism Gadolinium Kerr magnetooptical effect Multilayers Physics - Mesoscale and Nanoscale Physics Thickness
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