Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Critical angles effect: Vanishing of cubic magnetocrystalline anisotropy in ferromagnetic resonance spectra
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT.
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT.
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT.
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT.
2002 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 66, no 10, 104419-1-104419-5 p.Article in journal (Refereed) Published
Abstract [en]

The shapes of ferromagnetic resonance (FMR) spectra of laser deposited epitaxial Y3Fe5O12 (YIG) films strongly depend on the orientation of the magnetic field with respect to the crystalline axes of the film. Strain and compositional inhomogeneties in the films define local magnetic anisotropies and could be responsible for the complexity of FMR spectra. We show that, in accordance with the Smit-Suhl formula, the contribution from a spatial distribution of the cubic magnetocrystalline anisotropy to the FMR spectra vanishes at certain orientations ("critical angles") of the magnetic field. We prove experimentally that it is a necessary condition to orient the magnetic field at the critical angles in order to measure single-line FMR spectra in an inhomogenous laser deposited YIG film.

Place, publisher, year, edition, pages
2002. Vol. 66, no 10, 104419-1-104419-5 p.
Keyword [en]
YTTRIUM-IRON-GARNET, LASER ABLATION, FILMS, DEPOSITION, MICROWAVE
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:kth:diva-6466DOI: 10.1103/PhysRevB.66.104419ISI: 000178460900058OAI: oai:DiVA.org:kth-6466DiVA: diva2:11187
Note
QC 20111121Available from: 2004-11-12 Created: 2004-11-12 Last updated: 2017-12-14Bibliographically approved
In thesis
1. On ferromagnetic thin films and two-dimensional magneto-optic photonic crystals
Open this publication in new window or tab >>On ferromagnetic thin films and two-dimensional magneto-optic photonic crystals
2004 (English)Doctoral thesis, comprehensive summary (Other scientific)
Abstract [en]

This thesis presents results in two different neighboring areas of research: the magnetic properties of thin ferrite films and the application of the films in two-dimensional photonic crystals.

In the first part, we investigate the accuracy of the customary method for determining the magnetic anisotropy constants of ferrite films by ferromagnetic resonance (FMR) experiment. We have improved the method and introduced an experimental procedure to obtain the anisotropy constants with higher precision. The magnetic anisotropy fields are obtained by using FMR on a (111)-oriented yttrium iron garnet (YIG) film made by pulsed laser deposition. Moreover, we found experimentally that the shapes of FMR spectra of laser deposited epitaxial YIG films strongly depend on the orientation of the magnetic bias field with respect to the crystalline axes of the film. Inhomogeneities of the constants of anisotropy throughout the film could be responsible for the complexity of the FMR spectra. We find the special directions of the applied magnetic field in which the contribution of the magnetocrystalline anisotropy has the smallest effect on the ferromagnetic resonance and therefore on the elements of the permeability tensor.

In the second part, we study the electromagnetic wave propagation in two-dimensional (2D) dielectric and magneto-optic photonic crystals (PCs). We have proposed a 2D PC which is composed of magneto-optic material for the purpose of the enhancement of Faraday rotation in high transmission. It is assumed that the 2D PC contains a bismuth iron garnet (BIG) film either as the PC background medium or as a defect, embedded in the 2D PC. We have examined theoretically and computationally the increase in the Faraday rotation as well as the transmission of a plane-polarized plane wave incident onto these structures in the optical wavelength regime. Several important phenomena, with potential applications, are observed.

Place, publisher, year, edition, pages
Kista: Mikroelektronik och informationsteknik, 2004
Series
TRITA-MVT, ISSN 0348-4467 ; 2004:6
Keyword
Physics, photonic crystals, physics, Fysik
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-42 (URN)
Public defence
2004-11-12, C1, Electrum, Kista, 13:00
Opponent
Supervisors
Available from: 2004-11-12 Created: 2004-11-12 Last updated: 2016-11-24

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Jalali-Roudsar, Amir AbbasKahl, SörenDenysenkov, VasylGrishin, Alexander M.
By organisation
Microelectronics and Information Technology, IMIT
In the same journal
Physical Review B. Condensed Matter and Materials Physics
Condensed Matter Physics

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 86 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf