The energies and life times of magnons in bulk iron and one-monolayer Fe film

Buczek, Paweł; Ernst, A.; Sandratskii, L. M.; Bruno, P.

doi:10.1016/j.jmmm.2009.03.010

Cited by 13 publications

(11 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ref. 24 performed calculations for an Fe ML on W(110), comparing the results of the adiabatic approach to those including the coupling to the Stoner continuum, and found no substantial differences. However, this can be system-dependent.…”

Section: Discussionmentioning

confidence: 99%

“…This leads to Landau damping 21,22 , which can heavily damp the spin-wave modes, and it may also renormalize the spinwave energies. However, it has been argued theoretically and demonstrated by explicit calculations 15,23,24 that the Heisenberg model description is reasonable for low spinwave energies and not too large wavevectors, which is precisely the range relevant to (SP)EELS and the one in which we are interested.…”

mentioning

confidence: 95%

See 1 more Smart Citation

First-principles investigation of spin-wave dispersions in surface-reconstructed Co thin films on W(110)

2017

View full text Add to dashboard Cite

We computed spin-wave dispersions of surface-reconstructed Co films on the W(110) surface in the adiabatic approximation. The magnetic exchange interactions are obtained via first-principles electronic-structure calculations using the Korringa-Kohn-Rostoker Green-function method. We analyze the strength and oscillatory behavior of the intralayer and interlayer magnetic interactions and investigate the resulting spin-wave dispersions as a function of the thickness of Co films. In particular, we highlight and explain the strong impact of hybridization of the electronic states at the Co-W interface on the magnetic exchange interactions and on the spin-wave dispersions. We compare our results to recent measurements based on electron-energy-loss spectroscopy [E. Michel, H. Ibach, and C.M. Schneider, Phys. Rev. B 92, 024407 (2015)]. Good overall agreement with experimental findings can be obtained by considering the possible overestimation of the spin splitting, stemming from the local-spin-density approximation, and adopting an appropriate correction.

show abstract

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 95%

First-principles investigation of spin-wave dispersions in surface-reconstructed Co thin films on W(110)

2017

View full text Add to dashboard Cite

show abstract

“…However, the method provides a reliable account of the spin wave energies. 25 The small penetration depth of electrons in SPEELS experiment raises an important question about the spatial localization of the magnetic excitations measured in this experiment. Two limits can be considered: ͑1͒ the incoming electron excites mainly the uppermost ͑surface͒ magnetic moments while the dynamics of the deeper layers arises as a secondary effect due to the exchange coupling with the top layers or ͑2͒ the magnetic moments of all layers are equally involved in the excitation process and the spin wave mode is uniform with respect to the depth of the film.…”

Section: Resultsmentioning

confidence: 88%

“…The hybridization of the Fe and W states strongly influences the electronic structure of the film and in turn the exchange parameters and SW dispersion relation. 25 Returning to the supported films we took into account the atomic relaxations by using the interlayer distances determined experimentally. 26,27 Accounting for atomic relaxation results in a significant change in the SW energy in Fig.…”

Section: Resultsmentioning

confidence: 99%

Nonmonotonic thickness dependence of spin wave energy in ultrathin Fe films: Experiment and theory

et al. 2010

View full text Add to dashboard Cite

High wave-vector spin waves in ultrathin Fe/W͑110͒ films up to 20 monolayers ͑MLs͒ thick have been studied using spin-polarized electron energy-loss spectroscopy. An unusual nonmonotonous dependence of the spin wave energies on the film thickness is observed, featuring a pronounced maximum at 2 ML coverage. First-principles theoretical study reveals the origin of this behavior to be in the localization of the spin waves at the surface of the film, as well as in the properties of the interlayer exchange coupling influenced by the hybridization of the electron states of the film and substrate and by the strain.

show abstract

“…17 Although Linear Response Density Functional Theory (LRDFT)-based studies of spin dynamics of iron 18,19 and the Heusler alloys 20 account for damping of high-energy magnon modes due to decay into Stoner excitations, it has been pointed out that spin-charge coupling in a band ferromagnet results in significant magnon damping for modes lying even within the Stoner gap.…”

mentioning

confidence: 99%