Vol Page/Article: Search Volumes 61 - Present: Abstract View New Search General Search Help ------------------------------------------------------------------------ Article Collection: View Collection Help (Click on the COLLECT ARTICLE to add an article.) ------------------------------------------------------------------------ [ Back To Hit List | Previous / Next search result abstract | Issue Table of Contents | Bottom of Page <#bot>] ------------------------------------------------------------------------ Physical Review B (Condensed Matter and Materials Physics -1(I)) Phys. Rev. B 67, 174411 (2003) (11 pages) Full Text: [ PDF (2999 kB) GZipped PS Order Document ] ------------------------------------------------------------------------ Correlation of dislocation and domain structure of Cr(001) investigated by spin-polarized scanning tunneling microscopy R. Ravlic, M. Bode, A. Kubetzka, and R. Wiesendanger Institute of Applied Physics and Microstructure Research Center, University of Hamburg, Jungiusstrasse 11, D-20355 Hamburg, Germany (Received 20 November 2002; published 16 May 2003) The Cr(001) surface has been investigated by spin-polarized scanning tunneling microscopy to image various defects and their effect on the magnetic structure at the surface. The usual magnetic structure is determined by the antiferromagnetic ordering of Cr leading to the topological antiferromagnetism of the (001) surface. We found that screw dislocations result in the formation of domain walls with a width of 120?170 nm. The dependence of the domain-wall width on the distance from the screw dislocation is studied experimentally and compared to micromagnetic simulations. Our results show that the size and shape of the spin structure is determined by two parameters, the exchange stiffness and the effective anisotropy. Subsurface step dislocations lead to an s-like bending of step edges on the sample surface. In spite of the step bending the topological antiferromagnetic order is strictly maintained. In some rare cases large scale images show a change of the spin-polarized part of the tunneling current. It is explained by the fourfold symmetry of the Cr(001) surface which leads to a 90° degeneracy and the formation of according domains. ©2003 The American Physical Society URL: http://link.aps.org/abstract/PRB/v67/e174411 doi: 10.1103/PhysRevB.67.174411 PACS: 75.70.Rf, 75.50.Ee, 68.37.Ef, 61.72.Ff Additional Information ------------------------------------------------------------------------ Full Text: [ PDF (2999 kB) GZipped PS Order Document ] ------------------------------------------------------------------------ References Citation links [e.g., Phys. Rev. D 40, 2172 (1989)] go to online journal abstracts. Other links (see Reference Information ) are available with your current login. 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Lai, Science (Washington, DC, U.S.) 295, 1042 (2002) . [INSPEC] The American Physical Society is a member of CrossRef . ------------------------------------------------------------------------ Full Text: [ PDF (2999 kB) GZipped PS Order Document ] [ Back To Hit List | Previous / Next search result abstract | Issue Table of Contents | Top of Page <#top>] ------------------------------------------------------------------------ Article Collection: View Collection Help ------------------------------------------------------------------------ [ Homepage | Browse Available Volumes | Search | Subscriptions | Contact Information | Online Help | Exit ]