Resonant Tunneling of Spin-Wave Packets via Quantized States in Potential Wells

Hansen, Ulf-Hendrik; Gatzen, Marius; Demidov, V. E.; Demokritov, S. O.

doi:10.1103/physrevlett.99.127204

Cited by 35 publications

(28 citation statements)

References 21 publications

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“…By inspection of Eqs. (23)(24)(25)(26)(27)(28)(29), one can notice that for the BMBC, the components of dynamical magnetization m x and m y are continuous ?, 41 , which is not the case for the HBC. Using the BMBC, we can also correctly determine the values of the interface exchange parameters implicitly existing for the NBC:…”

Section: Author Contributionsmentioning

confidence: 99%

Hartman effect for spin waves in exchange regime

Kłos

Dadoenkova

Rychły

et al. 2018

Sci Rep

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Hartman effect for spin waves tunnelling through a barrier in a thin magnetic film is considered theoretically. The barrier is assumed to be created by a locally increased magnetic anisotropy field. The considerations are focused on a nanoscale system operating in the exchange-dominated regime. We derive the formula for group delay τgr of a spin wave packet and show that τgr saturates with increasing barrier width, which is a signature of the Hartman effect predicted earlier for photonic and electronic systems. In our calculations, we consider the general boundary conditions which take into account different strength of exchange coupling between the barrier and its surrounding. As a system suitable for experimental observation of the Hartman effect we propose a CoFeB layer with perpendicular magnetic anisotropy induced by a MgO overlayer.

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Section: Author Contributionsmentioning

confidence: 99%

Hartman effect for spin waves in exchange regime

Kłos

Dadoenkova

Rychły

et al. 2018

Sci Rep

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“…Stripes and wires of various geometries, magnonic arrays, and three dimensional tubular structures have been intensively studied. Quantized spin wave modes, [14][15][16][17][18][19] spin wave "tunneling," [20][21][22][23] current induced Doppler shifts, 24,25 spin torque spin wave excitation, 26,27 magnon Bose-Einstein condensation, 28 and various nonlinear effects [29][30][31][32] have been observed in these structures. Spin wave interference was studied both numerically and experimentally.…”

Section: Introductionmentioning

confidence: 98%

Spin wave scattering and interference in ferromagnetic cross

Nanayakkara

Jacob

Kozhanov

2015

Journal of Applied Physics

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Magnetostatic spin wave scattering and interference across a CoTaZr ferromagnetic spin wave waveguide cross junction were investigated experimentally and by micromagnetic simulations. It is observed that the phase of the scattered waves is dependent on the wavelength, geometry of the junction, and scattering direction. It is found that destructive and constructive interference of the spin waves generates switching characteristics modulated by the input phase of the spin waves. Micromagnetic simulations are used to analyze experimental data and simulate the spin wave scattering and interference. V

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“…They can reflect when incident onto magnetic potential wells and can tunnel through magnetic barriers. [4,5] Magnetic storage industry provides an important backbone of information technology. Data storage relies on non-volatility and long-term stability of magnetic states.…”

Section: Introductionmentioning

confidence: 99%

Magnonics: Spin Waves on the Nanoscale

2009

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Magnetic nanostructures have long been in the focus of intense research in the magnetic storage industry. For data storage the nonvolatility of magnetic states is of utmost relevance. As information technology generates the need for higher and higher data‐transfer rates, research efforts have moved to understand magnetization dynamics. Here, spin waves and their particle‐like analog, magnons, are increasingly attracting interest. High‐quality nanopatterned magnetic media now offer new ways to transmit and process information without moving electrical charges. This new functionality is enabled by spin waves. They are confined by novel functioning principles, which render them especially suitable to operate at the nanoscale. Magnonic crystals are expected to provide full control of spin waves, similarly to what photonic crystals already do for light. Combined with nonvolatility, multifunctional metamaterials might be formed. We report recent advances in this rapidly increasing research field called magnonics.

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Resonant Tunneling of Spin-Wave Packets via Quantized States in Potential Wells

Cited by 35 publications

References 21 publications

Hartman effect for spin waves in exchange regime

Hartman effect for spin waves in exchange regime

Spin wave scattering and interference in ferromagnetic cross

Magnonics: Spin Waves on the Nanoscale

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