Title :
Inhomogeneities and coercivity of soft Permalloy thin films
Author :
Yuan, Samuel W. ; Bertram, H. Neal
Author_Institution :
Center for Magnetic Recording Res., California Univ., San Diego, La Jolla, CA, USA
fDate :
9/1/1992 12:00:00 AM
Abstract :
Coercivity mechanisms in thin 1000-Å Permalloy films due to inhomogeneous distributions of in-plane uniaxial anisotropy are investigated numerically, utilizing a two-dimensional domain wall model. The distribution of anisotropy could be attributed to the polycrystalline grain structure of thin films, as well as magnetostrictive stress. Typical anisotropy orientation dispersion induced by polycrystalline grains does not appear to account for the wall coercive force observed in soft Permalloy films. Other mechanisms, such as stress-induced anisotropy, may be dominant
Keywords :
Permalloy; coercive force; ferromagnetic properties of substances; magnetic anisotropy; magnetic domain walls; magnetic thin films; anisotropy orientation dispersion; coercivity; in-plane uniaxial anisotropy; inhomogeneous distributions; magnetic film; magnetostrictive stress; polycrystalline grain structure; soft Permalloy thin films; stress-induced anisotropy; two-dimensional domain wall model; wall coercive force; Anisotropic magnetoresistance; Coercive force; Magnetic anisotropy; Magnetic domain walls; Magnetic domains; Magnetic materials; Magnetostatics; Magnetostriction; Perpendicular magnetic anisotropy; Transistors;
Journal_Title :
Magnetics, IEEE Transactions on
