<i>Spin Waves</i>

Akhiezer, A.I.; Baryakhtar, V. G.; Peletminskiǐ, S. V.; Chomet, S.; Wortis, Michael

doi:10.1063/1.3035270

Cited by 92 publications

(187 citation statements)

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“…Then using standard spin-wave theory 32 and taking into account that spins are aligned against magnetization we get Im C͑q, ͒ϭϪ͑ ͗S͘/2͓͒␦͑ Ϫ⑀ q ͒ϩ␦͑ ϩ⑀ q ͔͒,…”

Section: ͑A2͒mentioning

confidence: 99%

Critical scattering of polarized neutrons in the invarFe65Ni35alloy

et al. 2004

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The magnetic phase transition in the invar Fe 65 Ni 35 alloy has been investigated by small-angle polarizedneutron scattering ͑SAPNS͒ along with both three-dimensional neutron depolarization and thermal-expansion measurements. The data give evidence for a smeared phase transition. A spatial distribution in the Curie temperature T C is introduced to explain the experimental data. The local T C variations are described by the standard deviation of the transition temperature ⌬T C and by the characteristic length of the T C variations, R 0 .The deduced parameters are ͗T C ͘ϭ485Ϯ0.5 K, ⌬T C ϭ12.5Ϯ0.2 K, and R 0 Ϸ300 nm. The critical SAPNS experiment was performed in a special inclined geometry (H ជ is inclined to the wave vector k ជ ). Two different contributions to the critical scattering were analyzed in the magnetic-field range ͑1-1000 G͒ and the temperature range (T C Ϯ0.1T C ) of interest. First, the two-spin-correlation function was studied. Second, the dynamical three-spin-correlation function, or the so-called dynamical chirality of the system, was investigated by extracting the asymmetric part of the polarization-dependent scattering. We distinguish two contributions in the chiral scattering, which stem from the spin waves in the large magnetic inhomogeneities and from the three-spincorrelation function of the critical fluctuations. The data are interpreted in terms of the static and dynamic scaling theory accounting for the concept of local T C variations.

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“…Then using standard spin-wave theory 32 and taking into account that spins are aligned against magnetization we get Im C͑q, ͒ϭϪ͑ ͗S͘/2͓͒␦͑ Ϫ⑀ q ͒ϩ␦͑ ϩ⑀ q ͔͒,…”

Section: ͑A2͒mentioning

confidence: 99%

Critical scattering of polarized neutrons in the invarFe65Ni35alloy

et al. 2004

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“…Since for electromagnetic waves in ferromagnets there are two values of the wave vector to a given frequency, it follows that the rotation of the plane of polarization (the Faraday effect) is possible in ferromagnets [1,6]. When the wave propagation changes to the opposite direction, the rotation angle will be the same after the wave reflection.…”

Section: The Faraday-like Effect For Magnetostatic Modes In An Axiallmentioning

confidence: 99%

“…When the wave propagation changes to the opposite direction, the rotation angle will be the same after the wave reflection. At the same time, in a point where magnetization becomes oppositely directed, the rotation angle changes its sign [1,6]. For electromagnetic-wave ferrite cylinder resonator one has different resonant conditions (and, therefore, different resonant frequencies) for modes with + k and − k .…”

Section: The Faraday-like Effect For Magnetostatic Modes In An Axiallmentioning

confidence: 99%

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Handedness of magnetic-dipolar modes in ferrite disks

Kamenetskii

2006

Journal of Magnetism and Magnetic Materials

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AbsractFor magnetic-dipolar modes in a ferrite, components of the magnetic flux density in a helical coordinate system are dependent on both an orientation of a gyration vector and a sign of a pitch. It gives four types of helical harmonics for magnetostatic-potential wave functions in a ferrite disk. Because of the reflection symmetry breaking, coupling between certain types of helical harmonics takes place in the reflection points. The reflection feature leads to exhibition of two types of resonances: the "right" and "left" resonances. These resonances become coupled for a ferrite disk placed in a homogeneous tangential RF magnetic field. One also observes such resonance coupling for a ferrite disk with a symmetrically oriented linear surface electrode, when this ferrite particle is placed in a homogeneous tangential RF electric field. In a cylindrical coordinate system handedness of magnetic-dipolar modes in a ferrite disk is described by spinor wave functions.

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“…[23][24][25][26][27][28][29][30][31][32][33][34][35] The magnetic properties of Ni nanowires are controlled by the shape anisotropy, to which shape and magnetocrystalline contributions act as small perturbations. The main difference between the ideal nanowire and the real nanowire descriptions consists in the replacement of the cylinder-like symmetry with an ellipsoid of rotation symmetry.…”

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confidence: 99%