Magnetization precession induced by quasitransverse picosecond strain pulses in (311) ferromagnetic (Ga,Mn)As

Bombeck, M.; Jäger, J. V.; Scherbakov, A. V.; Linnik, T. L.; Yakovlev, D. R.; Liu, X.; Furdyna, J. K.; Akimov, A. V.; Bayer, М.

doi:10.1103/physrevb.87.060302

Cited by 38 publications

(31 citation statements)

References 24 publications

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“…[42] (see Fig.1 (a)). The strong demagnetization field Bd and in-plane direction of the external magnetic field B bring the equilibrium magnetization to the film plane.…”

Section: Appendix B Laser-pulse Induced Magnetization Precessionmentioning

confidence: 99%

Ultrafast changes of magnetic anisotropy driven by laser-generated coherent and noncoherent phonons in metallic films

et al. 2016

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. (2016) Ultrafast changes of magnetic anisotropy driven by laser-generated coherent and noncoherent phonons in metallic films. Physical Review B, 93 (21 A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. ABSTRACTUltrafast optical excitation of a metal ferromagnetic film results in a modification of the magnetocrystalline anisotropy and induces the magnetization precession. We consider two main contributions to these processes: an effect of non-coherent phonons, which modifies the temperature dependent parameters of the magneto-crystalline anisotropy; and coherent phonons in the form of a strain contributing via inverse magnetostriction. Contrary to the earlier experiments with high symmetry ferromagnetic structures, where these mechanisms could not be separated, we study the magnetization response to femtosecond optical pulses in the low-symmetry magnetostrictive Galfenol film so that it is possible to separate the coherent and non-coherent phonon contributions. By choosing certain experimental geometry and external magnetic field, we can distinguish the contribution from a specific mechanism. Theoretical analysis and numerical calculations are used to support the experimental observations and proposed model.

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“…[42] (see Fig.1 (a)). The strong demagnetization field Bd and in-plane direction of the external magnetic field B bring the equilibrium magnetization to the film plane.…”

Section: Appendix B Laser-pulse Induced Magnetization Precessionmentioning

confidence: 99%

Ultrafast changes of magnetic anisotropy driven by laser-generated coherent and noncoherent phonons in metallic films

et al. 2016

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“…4(c)] (M x → M x and M y → −M y , which is equivalent to φ → −φ), the direction of magnetization precession changes in accordance with the above equation. We note that the foregoing discussion on magnetoelasticity is related to a myriad of other ultrafast [17][18][19][20][21][22] work as well as its connection to quasistatic straintronics [23,24].…”

Section: Experimental Techniquementioning

confidence: 99%

Ultrafast magnetoelastic probing of surface acoustic transients

et al. 2016

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We generate in-plane magnetoelastic waves in nickel films using the all-optical transient grating technique. When performed on amorphous glass substrates, two dominant magnetoelastic excitations can be resonantly driven by the underlying elastic distortions, the Rayleigh surface acoustic wave and the surface skimming longitudinal wave. An applied field, oriented in the sample plane, selectively tunes the coupling between magnetic precession and one of the elastic waves, thus demonstrating selective excitation of coexisting, large-amplitude magnetoelastic waves. Analytical calculations based on the Green's function approach corroborate the generation of multiple surface acoustic transients with disparate decay dynamics.

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“…Periodic arrays of non-magnetic materials, on the other hand, were shown to exhibit oscillations in their time-dependent reflectivity due to the generation of elastic waves in these phononic crystals [10,11]. Several groups have recently observed that acoustic waves can trigger magnetization precessions and even switching in continuous magnetic films via magneto-elastic coupling [12][13][14][15][16][17][18]. However, the interplay between phononic and magnetic modes generated in nanostructured array and its effect on the magnetization dynamics of a nanomagnet has not been investigated.…”

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confidence: 99%