Fluctuation mechanism for biquadratic exchange coupling in magnetic multilayers

Spatial fluctuations of Cr thickness amounting to one atomic monolayer account phenomenologically for the biquadratic magnetic coupling recently reported in epitaxial Fe/Cr/Fe trilayers. Corresponding fluctuations of the short-period oscillatory term of conventional exchange coupling induce static w...

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Bibliographic Details
Published in:Physical review letters 1991-11, Vol.67 (22), p.3172-3175
Main Author: SLONCZEWSKI, J. C
Format: Article
Language:English
Subjects:
Applied sciences
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties and materials
Magnetic properties of surface, thin films and multilayers
Metals. Metallurgy
Physics
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Summary:Spatial fluctuations of Cr thickness amounting to one atomic monolayer account phenomenologically for the biquadratic magnetic coupling recently reported in epitaxial Fe/Cr/Fe trilayers. Corresponding fluctuations of the short-period oscillatory term of conventional exchange coupling induce static waves of magnetization whose energy has the observed biquadratic form. An existing calculation of conventional exchange and its recent direct measurements in highly ordered trilayers support the interpretation.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.67.3172