GHz permeability of soft CoZr films: The role of exchange–conductivity coupling

The microwave permeability of CoZr films with different thicknesses is investigated. While Landau–Lifschitz model accounts for the response of the thinnest samples, several peaks are observed on the permeability of thicker layers. A simple model commonly used to account for the permeability of layer...

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Bibliographic Details
Published inJournal of magnetism and magnetic materials Vol. 310; no. 2; pp. 2319 - 2321
Main Authors Acher, O., Dubourg, S., Duverger, F., Malléjac, N.
Format Journal Article Conference Proceeding
LanguageEnglish
Published Amsterdam Elsevier B.V 01.03.2007
Elsevier Science
Subjects
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic permeability
Magnetic properties and materials
Microwave
Physics
Spinwave
Studies of specific magnetic materials
Thin film
Microwave
07.55
Magnetic permeability
Spinwave
Thin film
Thin films
Thickness
Interfaces
Landau theory
Microwave radiation
Magnetic permeability; Thin film; Spinwave; Microwave
High frequency
Soft magnetic materials
Skin effect
Exchange interactions
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Summary:The microwave permeability of CoZr films with different thicknesses is investigated. While Landau–Lifschitz model accounts for the response of the thinnest samples, several peaks are observed on the permeability of thicker layers. A simple model commonly used to account for the permeability of layers in the presence of skin effect is compared to a more sophisticate model taking into account the exchange–conduction coupling. Both models are found to be equivalent. They fail to account for the observed high frequency peaks. Introducing pinning conditions at the interface reproduces qualitatively observed behavior, suggesting the presence of standing spinwaves.
Bibliography:SourceType-Scholarly Journals-2
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ObjectType-Conference Paper-1
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ISSN:0304-8853
DOI:10.1016/j.jmmm.2006.11.029