Localized Defect Modes in a Two-Dimensional Array of Magnetic Nanodots

Abstract

Microwave properties of an array of magnetic nanodots in a ferromagnetic state having a point defect - a dot with inverted magnetization or different material parameters - are considered. The existence of a single point defect in a dot array may lead to the appearance of several localized modes: one "defect" eigenmode and several "well" modes, the number and structure of which strongly depend on the magnetostatic interaction between the dots. It is shown that by performing a ferromagnetic resonance \201FMR\202 experiment in an array of magnetic dots containing a small number of defects it is possible to obtain the information about the entire spin-wave spectrum of the array.

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Document Details

Document Type
Technical Report
Publication Date
Jun 22, 2013
Accession Number
ADA582732

Entities

People

  • Andrei Slavin
  • Elena Bankowski
  • Gennadiy Melkov
  • Roman Verba
  • Thomas Meitzler
  • Vasil Tiberkevich

Organizations

  • Oakland University

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Absorption
  • Absorption Spectra
  • Crystal Lattices
  • Crystals
  • Excitation
  • Ferromagnetic Resonance
  • Frequency
  • Geometry
  • Magnetic Fields
  • Magnetization
  • Materials
  • Microwaves
  • Point Defects
  • Resonance
  • Spectra
  • Spin Waves
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Microwave Engineering.
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.