Domain Structure in CoFeB Thin Films With Perpendicular Magnetic Anisotropy

Michihiko Yamanouchi, Shoji Ikeda, Fumihiro Matsukura, Hideo Ohno, Albrecht Jander, Pallavi Dhagat

Research output: Contribution to journalArticlepeer-review

87 Citations (Scopus)

Abstract

Domain structures in CoFeB-MgO thin films with a perpendicular easy magnetization axis were observed by magneto-optic Kerr-effect microscopy at various temperatures. The domain-wall surface energy was obtained by analyzing the spatial period of the stripe domains and fitting established domain models to the period. In combination with superconducting quantum interference device measurements of magnetization and anisotropy energy, this leads to an estimate of the exchange stiffness and domain-wall width in these films. These parameters are essential for determining whether domain walls will form in patterned structures and devices made of such materials.

Original languageEnglish
Pages (from-to)3000304
Number of pages1
JournalIEEE Magnetics Letters
Volume2
DOIs
Publication statusPublished - 2011 Dec 1

Keywords

  • Spin electronics
  • magnetic stripe domains
  • magneto-optic Kerr effect
  • perpendicular magnetic anisotropy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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