Spin-wave resonance in a tangentially magnetized thin film

Vasilevskaya, T. M.; Семенцов, Д. И.

doi:10.1134/s1063783407100162

Cited by 4 publications

(7 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…98,100 In Ref. 94,98,106, the case of a significant interface anisotropy [115][116][117][118][119][120][121][122][123] was also accounted for, leading to the following form of the Barnaś-Mills boundary conditions 98,100 used in our calculations…”

Section: Introductionmentioning

confidence: 99%

Formation of the band spectrum of spin waves in 1D magnonic crystals with different types of interfacial boundary conditions

Kruglyak¹,

Davies²,

Tkachenko³

et al. 2017

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

We report a theoretical study of the spin-wave band spectrum of magnonic crystals formed by stacking thin-film magnetic layers, with general assumptions about the properties of the interfaces between the layers. The use of the Barnaś-Mills magnetization boundary conditions has enabled us to systematically trace the origin of the magnonic band gaps in the spin-wave spectrum of such systems. We find that the band gaps are a ubiquitous attribute of a weakened interlayer coupling and a finite interface anisotropy (pinning). The band gaps in such systems represent a legacy of the discrete spinwave spectrum of the individual magnetic layers periodically stacked to form the magnonic crystal rather than result from Bragg scattering. At the same time, magnonic crystals with band gaps due to the Bragg scattering can be described by natural boundary conditions (i.e. those maintaining continuity of the magnetization direction across the whole sample). We generalize our conclusions to systems beyond thin-film magnonic crystals and propose magnonic crystals based on the ideas of graded-index magnonics and those formed by Fano resonances as a possible way to circumvent the discovered issues.

show abstract

Section: Introductionmentioning

confidence: 99%

Formation of the band spectrum of spin waves in 1D magnonic crystals with different types of interfacial boundary conditions

Kruglyak¹,

Davies²,

Tkachenko³

et al. 2017

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…However, in the ferromagnetic thin films, the D-E mode with 𝑞 ∥ = 0 is the ferromagnetic resonance (FMR) mode with a uniform distribution of the variable magnetization m through the thickness and in-plane direction of the film. This case corresponds to unpinning boundary conditions on both surfaces of thin films 42,43 . One should note that because of the limited numerical aperture of the focusing lens, all D-E modes with larger in-plane wavevectors contribute to the light scattering, which result in a continuous background spectrum (see Figure 3).…”

mentioning

confidence: 99%

“…is the sum of the external magnetic field 𝐻 0 and the anisotropy magnetic field 𝐻 𝑎 , 𝑞 is the wavevector of PSSW mode, and 4𝜋𝑀 0 = 2640 G −1 is the saturation magnetization of the film, respectively. The wave vectors of the spatially confined PSSW modes, 𝑞 𝑛 , are defined from the Landau-Lifshitz-Gilbert equation for the precession motion of the magnetization m with the following boundary conditions 42,43 :…”

mentioning

confidence: 99%

“…The specific values of 𝑞 𝑛 for different PSSW modes can be found from the following equation and then substituted in the dispersion relation of Eq. ( 1) in order to define the frequency of the corresponding PSSW mode 42,43 :…”

mentioning

confidence: 99%

“…at two interfaces. In case of symmetrical boundary conditions where 𝜉 1 = 𝜉 2 = 𝜉42,43 , the wave vectors of PSSW modes are governed by the condition 𝑞 𝑛 = (2𝑛 − 1)𝜋, 𝑛 ∈ 𝑁 = 1,2, …, which does not depend on the pinning parameter 𝜉. In this case, for the first two PSSW modes, one would obtain 𝑞 1 𝑑 = 𝜋 and 𝑞 2 𝑑 = 3𝜋, respectively.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Brillouin-Mandelstam spectroscopy of stress-modulated spatially confined spin waves in Ni thin films on piezoelectric substrates

Kargar

Balinskiy

Chiang

et al. 2020

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

We report results of micro-Brillouin-Mandelstam light scattering spectroscopy of thermal magnons in the two-phase synthetic multiferroic structure consisting of a piezoelectric [Pb(Mg1/3Nb2/3)O3](1-x) -[PbTiO3]x (PMN-PT) substrate and a Ni thin film with the thickness of 64 nm. The experimental data reveal the first two modes of the perpendicular standing spin waves (PSSW) spatially confined across the Ni thin film. A theoretical analysis of the frequency dependence of the PSSW peaks on the external magnetic field reveals the asymmetric boundary condition, i.e. pinning, for variable magnetization at different surfaces of the Ni thin film. The strain field induced by applying DC voltage to PMN-PT substrate leads to a down shift of PSSW mode frequency owing to the magneto-elastic effect in Ni, and corresponding changes in the spin wave resonance conditions. The observed non-monotonic dependence of the PSSW frequency on DC voltage is related to an abrupt change of the pinning parameter at certain values of the voltage. The obtained results are important for understanding the thermal magnon spectrum in ferromagnetic films and development of the low-power spin-wave devices.

show abstract

Temperature impact on the spectra of the spin-wave resonance in two-layer magnetic films

Zyuzin

Bakulin

Radaĭkin

et al. 2016

Phys. Metals Metallogr.

View full text Add to dashboard Cite

Spin-wave resonance in a tangentially magnetized thin film

Cited by 4 publications

References 4 publications

Formation of the band spectrum of spin waves in 1D magnonic crystals with different types of interfacial boundary conditions

Formation of the band spectrum of spin waves in 1D magnonic crystals with different types of interfacial boundary conditions

Brillouin-Mandelstam spectroscopy of stress-modulated spatially confined spin waves in Ni thin films on piezoelectric substrates

Temperature impact on the spectra of the spin-wave resonance in two-layer magnetic films

Contact Info

Product

Resources

About