Magnetic Permeability and Relaxation Frequency in High Frequency Magnetic Materials

Abstract

An investigation of the frequency behavior of polycrystalline ferrites is presented. It is shown that the low frequency dispersion (f < 10 MHz) of permeability is associated with the bulging of pinned domain walls, and has a mixed resonance-relaxation character, closer to the latter. It is also shown that there is a linear relationship between the magnetocrystalline anisotropy constant, K1, and the relaxation frequency. The slope of this correlation depends on the grain size. Such a relationship could allow the determination of this basic parameter from polycrystalline samples.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 2001
Accession Number
ADP012285

Entities

People

  • H. Montiel
  • M. I. Rosales
  • R. Valenzuela

Organizations

  • National University

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Dispersions
  • Domain Walls
  • Electron Microscopy
  • Ferromagnetic Resonance
  • Frequency
  • Grain Size
  • Impedance
  • Magnetic Materials
  • Materials
  • Materials Processing
  • Optical Materials
  • Permeability
  • Power Supplies
  • Resonance
  • Resonant Frequency
  • Scanning Electron Microscopy
  • Single Crystals

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Microwave Engineering.