Second Harmonic Generation Versus Linear Magneto-Optical Response Studies of Laser-Induced Switching of Pinning Effects in Antiferromagnetic/Ferromagnetic Films

Composite magnetic nanostructures are a subject of high research interest, as they provide a number of exciting effects absent in live nature. Among others, much attention has been paid to the studies of exchange coupling in antiferromagnetic/ferromagnetic (AFM/FM) films, which leads to the pinning...

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Published inPhotonics Vol. 10; no. 12; p. 1303
Main Authors Kolmychek, Irina A., Novikov, Vladimir B., Gusev, Nikita S., Pashen’kin, Igor Yu, Karashtin, Evgeny A., Murzina, Tatiana V.
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.12.2023
Subjects
Anisotropy
Antiferromagnetism
Asymmetry
Bias
Comparative analysis
Comparative studies
Cooling
Electrons
exchange bias
Ferromagnetic films
Ferromagnetic materials
Ferromagnetism
Glass substrates
Hysteresis
Hysteresis loops
Interfaces
Kerr magnetooptical effect
Lasers
Light
Magnetic effects
Magnetic fields
Magnetic hysteresis
Magnetization
magneto-optics
Parameter sensitivity
Pinning
Radiation
Second harmonic generation
Switching
Temperature
Thickness
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Summary:Composite magnetic nanostructures are a subject of high research interest, as they provide a number of exciting effects absent in live nature. Among others, much attention has been paid to the studies of exchange coupling in antiferromagnetic/ferromagnetic (AFM/FM) films, which leads to the pinning effect. It manifests itself as a widening and shift of the magnetic hysteresis loop with respect to zero value of the external magnetic field oriented along the pinning direction. In this work, we report on comparative studies of linear and nonlinear magneto-optical effects under the laser-induced switching of the pinning effect in IrMn/CoFe films of various thickness of the ferromagnetic CoFe layer. We found that the magneto-optical response of the pinned AFM/FM nanofilms appears with different hysteresis loop parameters in the transverse magneto-optical Kerr effect (MOKE) and interface-sensitive magnetization-induced second harmonic generation (SHG), indicating the diversity of the magnetic effects at interfaces compared to the bulk of the films.
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ISSN:2304-6732
2304-6732
DOI:10.3390/photonics10121303