Spin waves transport across a ferrimagnetically ordered nanojunction of cobalt-gadolinium alloy between cobalt leads

Doried Ghader, Vinod Ashokan, Michel Abou Ghantous, Antoine Khater

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

A model calculation is presented for the spin wave scattering and coherent transport at the ferrimagnetically ordered cobalt-gadolinium alloy nanojunction between cobalt leads. The structural model for the amorphous alloy nanojunction [Co1/2Gd1/2]3 is considered as an ordered alloy hcp structure of three (0001) atomic planes between the leads. To analyze the spin dynamics and spin wave scattering at the nanojunction boundary, the phase field matching method (PFMT) is implemented over the ground state of the system, in the Heisenberg Hamiltonian representation. The coherent reflection and transmission probabilities of spin waves from the cobalt leads incident onto the nanojunction boundary are calculated, and numerical results are presented for the coherent SW transport across the nanojunction over the entire range of their frequencies. The results are especially valid in the interval between nanometric SW wavelengths greater than the nanojunction width and macroscopic wavelengths. They demonstrate in particular, the possibility of the resonance assisted maxima for the SW transmission spectra owing to the interactions between the incident spin waves and the localized spin resonances on the nanojunction. This effect is general and may be observed at different characteristic frequencies and corresponding incident angles.

Original languageEnglish
Article number180
JournalEuropean Physical Journal B
Volume86
Issue number4
DOIs
Publication statusPublished - Apr 2013
Externally publishedYes

Fingerprint

Gadolinium alloys
gadolinium alloys
cobalt alloys
Cobalt alloys
Spin waves
Cobalt
magnons
cobalt
wave scattering
Scattering
Spin dynamics
Hamiltonians
Wavelength
spin resonance
Wave transmission
Amorphous alloys
spin dynamics
wavelengths
Ground state
intervals

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Spin waves transport across a ferrimagnetically ordered nanojunction of cobalt-gadolinium alloy between cobalt leads. / Ghader, Doried; Ashokan, Vinod; Ghantous, Michel Abou; Khater, Antoine.

In: European Physical Journal B, Vol. 86, No. 4, 180, 04.2013.

Research output: Contribution to journalArticle

Ghader, Doried ; Ashokan, Vinod ; Ghantous, Michel Abou ; Khater, Antoine. / Spin waves transport across a ferrimagnetically ordered nanojunction of cobalt-gadolinium alloy between cobalt leads. In: European Physical Journal B. 2013 ; Vol. 86, No. 4.
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