Journal
PHYSICAL REVIEW B
Volume 85, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.85.014427
Keywords
-
Funding
- National Science Foundation of the USA [DMR-1015175]
- US Army TARDEC
- RDECOM
- DARPA
- Ministry of Education and Science, Youth and Sport of Ukraine [M/90-2010]
- State Fund for Fundamental Research of Ukraine [F34/452-2011]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1015175] Funding Source: National Science Foundation
Ask authors/readers for more resources
A general theory of collective spin-wave excitations in a two-dimensional array of magnetic nanodots coupled by magnetodipolar interaction is developed. The theory allows one to analytically calculate spectra, damping rates, excitation efficiencies, and other characteristics of spin waves in both periodic and aperiodic ground states of an array. It is demonstrated that all the properties of collective spin waves in an array existing in any spatially periodic ground state (e. g., ferromagnetic or chessboard antiferromagnetic) are determined by the same state-independent array's demagnetization tensor (F) over cap (k), which is determined by the spin-wave wave vector k, the size and shape of the array's elements (nanodots), and the geometry of the array's lattice. The applications of the developed general theory are illustrated on particular examples: (i) spin waves in ferromagnetic and chessboard antiferromagnetic states of a square array, and (ii) localized spin-wave excitations associated with an isolated defect in a uniform ferromagnetic ground state of a square array.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available