Abstract
The use of multilayer magnetic films to constrain domain walls to localized regions is discussed. In particular, films which consist of a composite of hard and soft films are investigated; the soft film is continuous, whereas a window is provided in the hard film. It is demonstrated that the edge of a hard film (Hchard≃20 Oe) provides an effective barrier for domains propagating in a window of soft Permalloy film (Hcsoft≃2 Oe). This is an alternative technique which offers a number of advantages over tapered edges, alloy compositional variations substrate roughening, and masked evaporation. Specifically, electrodeposition combined with photographic masking facilitates fabrication. An expression for the effective ``punch-through'' field required to drive a domain wall into the composite film is derived. It is concluded that the ``punch-through'' field Hpt is approximately given by Hpt≃(Hncomp+2Hcsoft)/3,where Hncomp is the nucleation field of the composite film and Hcsoft is the coercive force of the soft film. Measurements on the ``punch-through'' fields from magneto-optic and Bitter pattern observations are presented.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
