Spin dynamics induced by ultrafast heating with ferromagnetic/antiferromagnetic interfacial exchange in perpendicularly magnetized hard/soft bilayers

Q. L. Ma, Satoshi Iihama, X. M. Zhang, T. Miyazaki, Shigemi Mizukami

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The laser-induced spin dynamics of FeCo in perpendicularly magnetized L10-MnGa/FeCo bilayers with ferromagnetic and antiferromagnetic interfacial exchange coupling (IEC) are examined using the time-resolved magneto-optical Kerr effect. We found a precessional phase reversal of the FeCo layer as the IEC changes from ferromagnetic to antiferromagnetic. Moreover, a precession-suspension window was observed when the magnetic field was applied in a certain direction for the bilayer with ferromagnetic IEC. Our observations reveal that the spin dynamics modulation is strongly dependent on the IEC type within the Landau-Lifshitz-Gilbert depiction. The IEC dependence of the precessional phase and amplitude suggests the interesting method for magnetization dynamics modulation.

Original languageEnglish
Article number222404
JournalApplied Physics Letters
Volume107
Issue number22
DOIs
Publication statusPublished - 2015 Nov 30

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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