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Author Pizzagalli, L. ♦ Stoeffler, D. ♦ Gautier, F.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ PHYSICS ♦ ATOMIC CLUSTERS ♦ THIN FILMS ♦ MAGNETIC PROPERTIES ♦ VANADIUM ♦ SUBSTRATES ♦ IRON ♦ CHROMIUM ♦ NICKEL ♦ MANGANESE ♦ ELECTRONIC STRUCTURE ♦ GROUND STATES ♦ ISING MODEL ♦ TIGHT BINDING APPROXIMATION
Abstract We study the magnetic properties of transition-metal monolayers (ML) and Cr clusters deposited on Fe(001). We use a self-consistent tight-binding model and the recursion technique in order to get the most stable magnetic state for each atomic configuration. The magnetism is taken into account in the mean-field approximation. We show that for a Cr ML the {ital p}(2{times}2) magnetic solution is lower in energy than all the others. We find that monolayers of V, Ni, and Co are ferromagnetic {ital p}(1{times}1) on Fe(001) whereas the Mn ML are {ital c}(2{times}2) antiferromagnetic. We study also the magnetic transition occurring for Cr clusters, for an increasing Cr atoms number, from ferromagnetic to the {ital p}(2{times}2) order. The results of these calculations are in agreement with those of an Ising model whose parameters are determined. Such an Ising model predicts with a good accuracy the most stable state and the first excited states for each cluster shape. {copyright} {ital 1996 The American Physical Society.}
ISSN 01631829
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-11-01
Publisher Place United States
Journal Physical Review, B: Condensed Matter
Volume Number 54
Issue Number 17


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