2007
DOI: 10.1002/pssb.200743107
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Magnon energy gap in a three‐layer ferromagnetic superlattice

Abstract: The magnon energy band in a three-layer ferromagnetic superlattice is studied by using the linear spinwave approach and Green's function technique. It is found that two modulated energy gaps exist in the magnon energy band along K x direction perpendicular to the plane of the superlattice. The spin quantum numbers and the interlayer exchange couplings all affect the two energy gaps. The disappearance of one of the energy gaps corresponds to a high symmetry among the interlayer exchange couplings, while the van… Show more

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Cited by 5 publications
(11 citation statements)
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“…Our point of view can be compared with that in literatures [31][32][33][34][35]. The magnon gap is a function of the magnetic anisotropy: the stronger the anisotropy is, the bigger the magnon gap [31].…”
Section: Article In Pressmentioning
confidence: 98%
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“…Our point of view can be compared with that in literatures [31][32][33][34][35]. The magnon gap is a function of the magnetic anisotropy: the stronger the anisotropy is, the bigger the magnon gap [31].…”
Section: Article In Pressmentioning
confidence: 98%
“…Schwenk et al [32,33] also thought that the vanishing of gaps could be understood by a C 2 symmetry operation around the zaxis. In three-layer ferrimagnetic superlattice [34] and FM one [35], two zero energy gaps correspond to different higher magnetically structural symmetry. The previous results [31][32][33][34][35] agree well with the viewpoint of the present work.…”
Section: Article In Pressmentioning
confidence: 98%
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