Dominant role of inverse Cotton-Mouton effect in ultrafast stimulation of magnetization precession in undoped yttrium iron garnet films by 400-nm laser pulses

Shen, Lei; Zhou, Liqing; Shi, J. Y.; Tang, Meng; Zheng, Zhe; Wu, Di; Zhou, Shiming; Chen, L. Y.; Zhao, Haibin

doi:10.1103/physrevb.97.224430

Cited by 17 publications

(10 citation statements)

References 53 publications

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“…Consequently, the inverse Cotton−Mouton effect and the photomagnetic induced anisotropy both play an important role in this process. A similar situation was observed previously in studies, 36,37 where the detailed qualitative and quantitative description of the complicated interplay of these two effects was performed. In particular, it was shown that the amplitude and phase of the excited spin precession strongly depend on the polarization of the femtosecond pulse.…”

supporting

confidence: 75%

All-Dielectric Nanophotonics Enables Tunable Excitation of the Exchange Spin Waves

et al. 2020

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Launching and controlling magnons with laser pulses opens up new routes for applications including optomagnetic switching and all-optical spin wave emission and enables new approaches for information processing with ultralow energy dissipation. However, subwavelength light localization within the magnetic structures leading to efficient magnon excitation that does not inherently absorb light has still been missing. Here, we propose to marriage the laser-induced ultrafast magnetism and nanophotonics to efficiently excite and control spin dynamics in magnetic dielectric structures. We demonstrate that nanopatterning by a 1D grating of trenches allows localization of light in spots with sizes of tens of nanometers and thus launch the exchange standing spin waves of different orders. The relative amplitude of the exchange and magnetostatic spin waves can be adjusted on demand by modifying laser pulse polarization, incidence angle, and wavelength. Nanostructuring of the magnetic media provides a unique possibility for the selective spin manipulation, a key issue for further progress of magnonics, spintronics, and quantum technologies.

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supporting

confidence: 75%

All-Dielectric Nanophotonics Enables Tunable Excitation of the Exchange Spin Waves

et al. 2020

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“…We note that the amplitudes and phases of all five magnetic resonance modes do no depend on the polarization of the pump pulses. This clearly demonstrates that the pump polarization-dependent mechanisms such as the photoinduced magnetic anisotropy [22][23][24][25] and the Cotton-Mouton effect [28,29] are not at the origin of the excitation. The insensitivity of the excitation on the polarization of the pump suggests that the photons are absorbed and induce an ultrafast change of the magnetic anisotropy via incoherent or coherent phonons, i.e., by ultrafast heating of the lattice [18,[37][38][39] and/or due to inverse magnetostriction induced by a hypersound wave propagating into the film [40][41][42][43][44].…”

Section: Femtosecond Laser-excitation-driven High Frequency Standing mentioning

confidence: 88%

“…In particular, it was demonstrated that femtosecond laser pulses can excite exchange standing SWs (SSWs) in metallic [18,19] and semiconductor [20,21] ferromagnets via thermal processes. On the other hand, most studies on iron garnets have been dedicated to the excitation and control of the homogenous resonance mode (k ¼ 0, i.e., low frequency) via nonthermal excitation mechanisms [22][23][24][25][26][27][28][29]. An important question in this context concerns the possibility to take advantage of femtosecond laser pulses for triggering a high frequency SSW in dielectric thin films of iron garnets.…”

Section: Femtosecond Laser-excitation-driven High Frequency Standing mentioning

confidence: 99%

Femtosecond Laser-Excitation-Driven High Frequency Standing Spin Waves in Nanoscale Dielectric Thin Films of Iron Garnets

et al. 2019

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HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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“…We note that the characteristics of the excited SSWs, such as the amplitude and phases, are independent of the polarization of the pump beam. This reveals that pump polarization-dependent mechanisms, such as the inverse Cotton-Mouton effect [48][49][50],…”

Section: Results and Disccussionmentioning

confidence: 91%

Damping of Standing Spin Waves in Bismuth-Substituted Yttrium Iron Garnet as Seen via the Time-Resolved Magneto-Optical Kerr Effect

et al. 2019

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We investigate spin-wave resonance modes and their damping in insulating thin films of bismuthsubstituted yttrium iron garnet by performing femtosecond magneto-optical pump-probe experiments. For large magnetic fields in the range below the magnetization saturation, we find that the damping of high-order standing spin-wave (SSW) modes is about 40 times lower than that for the fundamental one. The observed phenomenon can be explained by considering different features of magnetic anisotropy and exchange fields that, respectively, define the precession frequency for fundamental and high-order SSWs. These results provide further insight into SSWs in iron garnets and may be exploited in many new photomagnonic devices.

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Dominant role of inverse Cotton-Mouton effect in ultrafast stimulation of magnetization precession in undoped yttrium iron garnet films by 400-nm laser pulses

Cited by 17 publications

References 53 publications

All-Dielectric Nanophotonics Enables Tunable Excitation of the Exchange Spin Waves

All-Dielectric Nanophotonics Enables Tunable Excitation of the Exchange Spin Waves

Femtosecond Laser-Excitation-Driven High Frequency Standing Spin Waves in Nanoscale Dielectric Thin Films of Iron Garnets

Damping of Standing Spin Waves in Bismuth-Substituted Yttrium Iron Garnet as Seen via the Time-Resolved Magneto-Optical Kerr Effect

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