Arrangement for the investigation of domain behaviour under low-frequency magnetic fields

L. Pogány, C. Hargitai, I. Varga

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The magnetic energy of a material as function of the magnetising field has many minima, each of which corresponds to an individual domain arrangement. The number of minima depends on the magnetic anisotropy and the frequency of the magnetic field. By changing the magnetic field, the domain picture varies, and these changes characterise the dynamic properties of the material. Soft magnetic materials with strong magnetic anisotropy have only a few minima and in such materials there will be only a few different domain arrangements during the change in the magnetic field. The setup for the domain investigations consists of an Intel 8096 microcontroller, which controls a Jeol 840 scanning electron microscope synchronised with the magnetic field. The stroboscopic method of taking pictures works up to 2000 Hz and the domain images are averaged to improve the signal-to-noise ratio.

Original languageEnglish
Pages (from-to)189-190
Number of pages2
JournalJournal of Magnetism and Magnetic Materials
Volume160
DOIs
Publication statusPublished - Jul 1996

Fingerprint

Magnetic fields
low frequencies
Magnetic anisotropy
magnetic fields
Soft magnetic materials
Microcontrollers
anisotropy
Signal to noise ratio
magnetic materials
Electron microscopes
dynamic characteristics
Scanning
signal to noise ratios
electron microscopes
scanning
energy

Keywords

  • Domains
  • Magnetisation
  • Scanning electron microscopy

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Arrangement for the investigation of domain behaviour under low-frequency magnetic fields. / Pogány, L.; Hargitai, C.; Varga, I.

In: Journal of Magnetism and Magnetic Materials, Vol. 160, 07.1996, p. 189-190.

Research output: Contribution to journalArticle

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