Domain Structure in CoFeB Thin Films With Perpendicular Magnetic Anisotropy

TitleDomain Structure in CoFeB Thin Films With Perpendicular Magnetic Anisotropy
Publication TypeJournal Article
Year of Publication2011
AuthorsYamanouchi, M., A. Jander, P. Dhagat, S. Ikeda, F. Matsukura, and H. Ohno
JournalIEEE Magnetics Letters
Volume2
Pagination3000304 - 3000304
Date Published12/2011
ISSN1949-3088
Keywordsmagnetic stripe domains, magneto-optic Kerr effect, perpendicular magnetic anisotropy, spin electronics
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.

DOI10.1109/LMAG.2011.2159484
Short TitleIEEE Magn. Lett.