Magnetic domain structure and magnetostriction of Fe-Ga single crystal grown by the czochralski method

Shimpei Asano, Shun Fujieda, Shuichiro Hashi, Kazushi Ishiyama, Tsuguo Fukuda, Shigeru Suzuki

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The magnetic domain structure on the (0 0 1) plane of an Fe16.1Ga83.9 single crystal grown by the Czochralski method was observed by magneto-optic Kerr effect microscopy. In zero magnetic field, four different domain phases appeared, with magnetization in four kinds of <1 0 0> magnetic easy directions on the (0 0 1) plane. That is, the magnetic domain structure in zero field was composed of straight 90° domain walls and stair-like 180° domain walls. When a magnetic field was applied in the [0 1 0] direction, primarily 180° domain walls moved, whereas 90° domain walls did not. A striped domain structure composed of 90° domain walls was formed at a field of about 560 Oe, 180° domain walls having almost disappeared. A single domain structure was obtained by applying a field of about 1980 Oe. Magnetostriction in the [0 1 0] direction on the (0 0 1) plane was only about 10 ppm in a field of about 560 Oe and reached a saturation value of about 153 ppm at a field of about 1980 Oe. This magnetostrictive behavior contributes to the evolution of the magnetic domain structure.

Original languageEnglish
Article number7600363
JournalIEEE Magnetics Letters
Volume8
DOIs
Publication statusPublished - 2017 Jan 1

Keywords

  • Crystals
  • Magnetic domain walls
  • Magnetic domains
  • Magnetic fields
  • Magnetization
  • Magnetostriction
  • Metals

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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