Microwave magnetic, dielectric and absorption properties of some cerium - Yttrium iron garnets

Mustaffa Hj Abdullah, Mardiana Ahmad, Noor Baa`Yah Ibrahim, Ahmad Nazlim Yusoff

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

This paper describes the microwave properties and application of some cerium-substituted yttrium-cerium iron garnets, Y3-x CexFe5012 (x ≤ 0.15), as micr owave absorbing materials. The complex scattering parameters due to reflection (S11* and S22*) and transmission (S21* and S12*), relative dielectric permittivity (εr* = εr′ -jεr ″) and relative magnetic permeability (μr* = μr′- jμr″) were measured using a mircoware vector network analyzer by means of a coaxial two-port technique in the frequency range of 0. 30-13.51 GHz. The mircowave power absorption in the materials is discussed as due to the dielectric and magnetic losses. The dielectric losses are interpreted as due to orientational dielectric relaxation and direct current conductivity. The maxima in magnetic losses correspond to domain wall and internal or natural ferromagnetic resonances. Microwave absorbing properties based on a metal-backed absorber were studied and discussed.

Original languageEnglish
Pages (from-to)205-210
Number of pages6
JournalSains Malaysiana
Volume37
Issue number2
Publication statusPublished - Jun 2008

Fingerprint

yttrium-iron garnet
cerium
dielectric loss
dielectric properties
magnetic properties
microwaves
ferromagnetic resonance
yttrium
garnets
domain wall
analyzers
absorbers
frequency ranges
direct current
permittivity
magnetic permeability
iron
conductivity
scattering
metals

Keywords

  • Dielectic permittivity
  • Magnetic permeability
  • Microwave absorption
  • Yttrium iron garnet

ASJC Scopus subject areas

  • General

Cite this

Microwave magnetic, dielectric and absorption properties of some cerium - Yttrium iron garnets. / Abdullah, Mustaffa Hj; Ahmad, Mardiana; Ibrahim, Noor Baa`Yah; Yusoff, Ahmad Nazlim.

In: Sains Malaysiana, Vol. 37, No. 2, 06.2008, p. 205-210.

Research output: Contribution to journalArticle

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